LS1 FAQ's

[SatisTraction]

This is a post that I made up when I was working on my LS1 swap. I went the budget route so most of this is for the do it yourself type of guy.

I have compiled this information from many hours of searches. The thanks for all this belongs to many people. If you see something of yours on here and you want credit or want it removed please let me know.

These are the pin outs for most LS1’s. This information alone will get most people on the right track.
1998 PCM Pin Assignments
1999 PCM Pin Assignments
2000 PCM Pin Assignments
2000 PCM Pin Assignments - Corvette
2001 PCM Pin Assignments
2002 PCM Pin Assignments
99 pin out
99 pins
99 pins
Coil Wiring

Posted by
Red Heartbeat
Wires removed from 2001 A4 harness for conversion
________________________________________
Okay, checked out my wiring harness conversion and found quite a few wires removed.
2001 LS1 5.7L with 4L60E A4 Transmission
Blue connector....
23 - Low Reference
25 - HO2S Low Signal Bank 2 Sensor 2
28 - HO2S Low Signal Bank 1 Sensor 2
32 - CPP Switch Signal ? what is CPP?
65 - HO2S High Signal Bank 2 Sensor 2
68 - HO2S High Signal Bank 1 Sensor 2
70 - Oil Level Switch Signal
Red Connector....
4 - Air Injection Reaction Solenoid Relay - Coil - Control
13 - Cruise Control Engage Signal
34 - Evaporative Canister Purge Solenoid Control
36 - AIR Pump Relay Control
37 - Cruise Control Inhibit Signal
45 - Evaporative Canister Vent Solenoid Control
46 - MIL Control ? what does MIL stand for?
53 - Ignition Retard Signal
54 - Fuel Level Sensor Signal
64- Fuel Tank Pressure Sensor Signal
2001 LS1 5.7L 4L60E four speed automatic
Removed pins and wires from Blue PCM connector....
23, 25, 28, 32, 65, 68 and 70
Removed pins and wires from Red PCM connector....
4, 7, 13, 34, 36, 37, 45, 53, 54 and 64
Bundle these wires together and route into the cab of vehicle.....
Blue 33 - Purple - TCC Brake Switch Signal - to brake switch - normal 12v positive and Zero
Volts when brake pedal is depressed .
Blue 34 - Orange/Black - Neutral Safety Switch
Blue 46 - Brown/White - Malfunction Indicator Light
Red 17 - Green/White - A/C request switch
Red 30 - Dk Blue - Fuel Enable Control - to VATS if not disabled in the PCM
Red 42 - Tan or Tan/Black - TCC Solenoid Valve Control
Red 50 - Green/White - Vehicle Speed Sensor Signal
Six fuse power block....
12v - Red - always "ON" from battery to three fused outlets
1. 30 amp 12V from fuse to terminal 87 for low fan relay
2. 30 amp 12V from fuse to terminal 87 for high fan relay
3. 10 amp 12V from fuse to PCM Blue 20 and 57
12V - Pink - from ignition "ON" switch to three fused outlets
1. 20 amp 12V from fuse to A/C relay terminal 87
2. 15 amp 12V from fuse to PCM Connector Blue 19
3. 15 amp 12V from fuse to fuel pump Relay terminal 87
Bosch Type Relay 1.
Low Speed Fan Relay
Terminal 85 connect to PCM Blue 42 - Dark Green
Terminal 30 Connect to Fan positive
Terminal 86 Connect to constant 12V Power Supply
Terminal 87 Connect to Switched 12V Power Supply
Bosch type Relay 2.
High Speed Fan Relay
Terminal 85 connect to PCM Red 33 - Dark Blue
Terminal 30 Connect to Fan positive
Terminal 86 Connect to constant 12V Power Supply
Terminal 87 Connect to Switched 12V Power Supply
Bosch type Relay 3.
Fuel relay
Terminal 85 connect to PCM Red 9 - Dark Green/White
Terminal 30 Connect to fuel pump 12V input
Terminal 86 Connect to Ground - black/white
Terminal 87 Connect to Switched 12V Power Supply
Bosch type Relay 4.
A/C relay
Terminal 85 connect to PCM Red 43 - Green/White - A/C Clutch Relay Control
Terminal 30 Connect to PCM Red 18 - Dark Green - A/C Compressor Clutch Supply Voltage
Terminal 87 Connect to switched 12V Power Supply
Terminal 86 Connect to PCM Blue 19 - Pink - Ignition 1 Voltage
My only concern is Relay 4. I don't see the logic there. It seems to me that Terminal 86 - Blue 19 - should have 12 Volts at the switch unless it is 12 Volts output from the PCM instead of input into the PCM. GM has always used the pink wire as switched power, red as constant 12V and Purple as the main starter solenoid lead.

Posted by
Magnus
Re: wiring questions
________________________________________
Hmm.. ok Lets go over the list..
Oil Pressure: Optional but recommended
Clutch Anticipate Switch Signal: uncertain
IGN Power for TCC Stop Lamp Switch: Optional but recommended
TCC/Cruse Brake Switch: Optional but recommended (Paired with above)
Ground
PNP Switch Signal: Optional
Low Coolant Indicator: Optional
VSS Output: Optional but recommended



5V Feed (Fuel tank pressure): Optional
MIL Control: Optional but recommended
EVAP Canister Vent Valve Control: Optional
Theft Deterrent Fuel Enable: Required
A/C Request: Optional
Fuel Ground: Optional depending on how your fueling is setup
Fuel Tank Pressure: Optional
Fuel Level Input: Optional
Serial Data (Class 2): Optional but recommended
Hot in Run and Start (IGN/INJ Bank 1 15A): Required
A/C Clutch Relay Control: Optional
A/C Clutch Status: Optional
TPS +5v to TCS: Optional
TPS signal to TCS: Optional
with IGN 1 Relay Engaged (Tranny/EGR 15A): Required
Cooling Fan 2 and 3 Relay Control: Optional but HIGHLY recommended
Cooling Fan 1 Relay Control: Optional but HIGHLY recommended
TPS sensor low to TCS: Optional

Low Coolant Sensor: Optional
Hot in Run and Start (IGN/INJ Bank 2 15A): Required
Air Pump Relay Control: Optional
Fuel Pump Relay Control: Required most likely
Ignition Positive Voltage for PCM: Required
Battery Positive Voltage for PCM: Required
Ground:
TCS Spark Retard Signal to Brake Control Module: Optional

Hot with IGN 1 Relay Engaged (TCC Stop Lamp Switch/MAF/O2 20A): Required
Cruise Control Inhibit: Optional
Cruise Engaged Signal: Optional
Tach out to Brake Control Module: Optional (Re-use for dash tach)
AIR Solenoid Relay Control: Optional
Posted By
MrDude_1
let me take a min to explain what that means (i know i wish someone did that for me first.. lol)

when you get a pullout that has the harness on the car, everything is connected except:
3 connectors that were underhood. (named C100,C101,C105)
2 connectors that used to connect under the dash (220,230)

so these 5 connectors are teh ONLY wires we're worred about.
in a nutshell... give ignition power to the pink wires, constant power to the orange ones, take off VATS, and it runs.
the other wires you hook up are just gauge wires, reverse lights, ect.... nothing hard.
its ALMOST a stand alone harness already... only diff is it will have a couple extra wires left after its hooked up.. not a big deal..
theres one more wire not listed there.. its a thick purple wire that goes to the starter.
when it gets +12v, the starter turns the motor over.

also, i bought HPtuners... you will either need HPtuners, or have your PCM flashed to remove the trouble codes and VATS.... if you buy HPtuners, this is NOT hard to do.. i could give you a step by step on doing it easily.... but HPtuners is a little pricy. a tune is a cheaper route, but HPtuners gives you the scanner thats very useful.. along with the ability to change stuff at will... your call on that.

Quote:
Originally Posted by SatisTraction
did any of you leave the diagnostic plug connected so taht you could connect a tuner for the computer?


yup.
all i did was go into the junkyard and grab one off of a GM ODBII car.....


posted by flippincamaro
hey here are the wires you need
99 LS1 PCM to Front Harness
Large Plug C100 Plug
A PNK Hot in Run and Start (IGN/INJ Bank 1 15A)
B DK GRN/WHT PCM 43 A/C Clutch Relay Control
C DK GRN PCM 18 A/C Clutch Status
D GRY TPS +5v to TCS
E DK BLU TPS signal to TCS
G PNK Hot with IGN 1 Relay Engaged (Tranny/EGR 15A)
H DK BLU PCM 33 Cooling Fan 2 and 3 Relay Control
J DK GRN PCM 42 Cooling Fan 1 Relay Control
K BLK TPS sensor low to TCS
C101 Plug
A YEL/BLK Low Coolant Sensor
B PNK Hot in Run and Start (IGN/INJ Bank 2 15A)
C BRN PCM 36 Air Pump Relay Control
D DK GRN/WHT PCM 9 Fuel Pump Relay Control
E PNK/BLK PCM 19 Ignition Positive Voltage for PCM
G ORN PCM 57 Battery Positive Voltage for PCM
H BLK/WHT Ground
K GRY/BLK PCM 53 TCS Spark Retard Signal to Brake Control Module
C105 Plug
B PNK Hot with IGN 1 Relay Engaged (TCC Stop Lamp Switch/MAF/O2 20A)
D DK GRN PCM 37 Cruise Control Inhibit
F WHT PCM 13 Cruise Engaged Signal
G WHT PCM 10 Tach out to Brake Control Module
H PPL PCM 4 AIR Solenoid Relay Control
These are all of the pins/wires I did not use:
220- E,H,J,K
230- A,C,F,G,H,J
C100- B,C,D,E,K
C101- A,C,K
C105- D,F,H
All the pink wires run into one wire which is ignition switch on i ran it to my ecm ignition on fuse on my truck fuse box. and the orange wire i ran a hot wire to it from my battery.

[SatisTraction]

posted by Oscar Will

The reverse lockout is operated from a clutch pedal position switch that inputs into C1-32 and the PCM operates (grounds) the reverse lockout through C2-44. If you want to use it you'll have to somehow get a normally closed switch in your clutch pedal linkage, the circuit is "hot" until you depress the clutch, when it goes "open" the PCM will ground the lockout solenoid. I can supply the schematic if you need it.

look at this thread

http://www.ls1tech.com/forums/showth...highlight=pink



Great info from LS2.com


some fuel system info
LS1 Swap Fuel System
There are several ways to go about doing this. The most common seems to be using and external pump connected from a sumped fuel tank to a corvette filter/regulator. This allows a return back to the tank and a single fuel supply line ran to the front of the car.
1999+ Corvette Filter/Regulator
http://www.hotrodlane.cc/PRODUCTS/ls...ilterstock.jpg
buy it from advanced auto for $50
Scooter70
http://www.ls1tech.com/forums/member.php?u=16459
http://matt.undiagnosed.org/ls1/fuel.html

for stock like push on connectors look here
http://store.summitracing.com/defaul...h.asp&x=42&y=8
http://www.russellperformance.com/au...uel-3-27.shtml

BY: ls1_chevelle
On the truck intakes(might be specific years) there is both the feed and return line going to the fuel rail(duh). Theres no need for a fuel pressure regulator because its already built in to the fuel rail itself.
This leaves you with many fueling choices. You can...
A) Run an external pump to feed the feed line and a return line that goes to the tank.
B) Run an Intank pump conversion such as the Tanks Inc. setup. http://www.tanksinc.com/index.cfm/p...=prod/prd84.htm and here it is being installed http://www.thedetailzone.com/Tanks%...p%20Install.htm
C) Run a newer generation plastic fuel tank. the 96 Impala SS fuel tank is supposed to be a bolt in to A-Body cars (69-72) and with slights mods can go into a Camaro. Only problem is that the tank is quite deep.
D) Go with an aftermarket tank such as Rock Valley http://www.rockvalleyantiqueautoparts.com/ndex.htm

[SatisTraction]

motor mounts


these can be bought for about $40 on ebay.

this is a popular subject. there are several types on the market but making your own is easy if you have some basic tools.
street and performance version

BRP mounts

make your own from these templates.

S&P style


BRP style


mount search

[SatisTraction]

Depending on your car / engine mounts you may have to notch your oil pan. The question is what material sould i use for the notch?

posted by 'JustDreamin'

According to Will Handzel's book, the Oil Pan is cast from 356-T6 aluminum (listed in a chart on page 26).

Out of curiosity, I looked up 356-T6 in one of my engineering texts, and that alloy has a fairly high silicon content (~7 %) and 0.4 % Magnesium. In T6 heat treated condition, it should have about 38 kpsi tensile strength.

Knowing that info should help select an alloy to use for parts and pieces.

My texts show there isn't a "perfect" match in a wrought alloy (stuff you'd find in barstock form) but 6061 seems to be the closest.

[SatisTraction]

Some part numbers


More Great stuff
Engine
12160244 IAT Sensor
24504388 IAT Sensor Grommet
12480033 Hot Cam Kit
10238852 LS1 Pushrod
12559271 Water Pump Gasket (need 2)
12561244 Front Crank Seal
12557840 Crank Pulley Bolt
12558013 Timing Cover Gasket
12558573 Exhaust manifold gasket
12559188 98-99 AIR tube (one side)
12559189 98-99 AIR tube (other side)
12556643 98-99 EGR tube
12553047 EGR gasket
12553617 AIR tube gasket
12557932 EGR O-ring seal
12560696 Valve Cover Gasket
12565117 LS6 valve springs
12560950 LS6 Camshaft
12568002 LS6 Valley cover
12658010 LS6 PCV kit
88890523 LS6 Intake
12568478 2001 Coolant pipe
12562788 2001 Coolant plug
12560744 "M-11" Headbolts (need 8/side)
12560745 "M-11" short headbolt (need 2/side)
12558840 OR 12558845 "M-8" Headbolts (need 5/side) *Not sure on which is correct*.
12558809 Head gasket (drivers side)
12558810 Head gasket (pass side)
12559188 98-99 AIR tube (one side)
12559189 98-99 AIR tube (other side)
12556643 98-99 EGR Tube Assembly
12553617 AIR tube gasket
12560696 Valve Cover Gasket
12559271 Water Pump Gasket (need 2)
12556436 2001 Oil Pump
16238212 Computer (PCM) 1998
12177561 Engine harness 1998 (manual)
25312196 RH O2 sensor
25312197 LH O2 Sensor
12558948 Coil
12560228 Crank Sensor
12560229 Cam sensor
12555424 Belt tensioner
10456603 Knock sensor
9353691 Body Control Mod. (BCM)
15301401 Coil harness
25179711 LS1 MAF
12160244 IAT sensor
12552059 Water pump pulley
25170361 Camaro lower airbox
25179711 00' Mass Air Sensor (whole assembly)
12561269 Intake manifold for 98-00 F-body
88890523 Intake manifold for 01 F-body
12557846 Intake manifold for 98-00 Y-body
88890524 Intake manifold for 01 Y-body(LS1 & LS6)
12560965 Camshaft for 98-00 F-body
12560964 Camshaft for 98-99 Y-body
12560968 Camshaft for 00 Y-body
12561721 Camshaft for 01 F-body & LS1 Y-body
12560950 Camshaft for 01 Y-body LS6
12560194 Left exhaust manifold for 98-99 F-body
12561308 Left exhaust manifold for 98-99 Y-body
12559507 Left exhaust manifold for 00-01 F-body
12562638 Left exhaust manifold for 00 Y-body
12561255 Left exhaust manifold for 01 Y-body LS1
12561256 Left exhaust manifold for 01 Y-body LS6
12560193 Right exhaust manifold for 98-99 F-body
12561309 Right exhaust manifold for 98-99 Y-body
12559506 Right exhaust manifold for 00 F-body
12562639 Right exhaust manifold for 00 Y-body
12567706 Right exhaust manifold for 01 F-body
12561256 Right exhaust manifold for 01 Y-body (LS1 & LS6)
17113390 Throttle body for 98-99 F-body
17113564 Throttle body for 98-99 Y-body
17113647 Throttle body for 00-01 F-body
17113669 Throttle body for 00-01 Y-body (LS1 & LS6)
12533952 Injector for 98 F-body & Y-body
12456154 Injector for 99-00 F-body & Y-body
12482704 Injector for 01 F-body & Y-body (LS1 & LS6)
12558807 Heads for 98 F-body & Y-body
12559855 Heads for 99-01 F-body & Y-body (LS1)
12560801 Heads for 01 Y-body (LS6)
12480033 Hotcam for LS1
Clutch/Transmission/Driveline
12562765 LS1 Flywheel
12560725 Aluminum drive shaft
10085375 1LE Aluminium Driveshaft
12570277 Clutch Master Cyl
12570281 Z06 clutch, pplate, flywheel
12562765 2001 Fbody clutch,pplate,fwheel
12565145 2001 Slave Cyl
15046288 2000 Slave Cyl
22146231 1LE Transmission Mount
12570281 Z06 clutch
Suspension
26032907 1LE front swaybar (32mm)
10221779 1LE endlinks
10021221 1LE rear swaybar (21mm)
10262147 1LE Panhard bar
22132887 1LE front springs
22132889 1LE rear springs
10221779 1LE endlinks
52367658 1LE Front Left Lower Control Arm
22156461 1LE Front left upper Control Arm
52367659 1LE Front Right Lower Control arm
22156462 1LE Front Right upper Control arm
22132887 1LE front springs
26032907 1LE front swaybar (32mm)
10288551 1LE front swaybar insulator (32mm)
10164151 1LE Lower Control Arms
10262147 1LE Panhard bar
22166910 1LE Rear shock insulator retainer
10009135 1LE Rear shock lower insulator
22166909 1LE Rear shock upper insulator
22132889 1LE rear springs
10021221 1LE rear swaybar (21mm)
10235886 1LE Rear swaybar insulator (21mm)
10413903 Torque Arm Bushing
22174970 Transmission Mount
18026165 Front brake pads
12454972 Rear brake pads
18038574 Durastop Disc Brake Pads
18039370 Durastop Performance Disc Brake Pads
18060239 Rear Brake Rotor
10434796 & 10434797 Brake backing plates (whole assembly w/ ebrake)
Misc.
12369966 SS logo (Silver)
12369965 SS logo (Red)
25121942 Fuel filter
12378261 Diff oil for auburn
12555685 Mobil 1 oil cap
10236268 Mobil 1 sticker
12556455 + 12559261 Fuel rail covers
12564257 + 12564258 Z06 Fuel rail covers
12457574 Ram Air Hood Stickers (White Metalic)
12455211 WS6 Air lid "Ram-Air" Sticker
12455209 WS6 Lower Air Box
12455212 WS6 Lower Air box/radiator support
12455213 WS6 Nostril Screen (1)
12455214 WS6 Nostril Screen (2)
12369963 SS Hood
12369964 SS Hood grill screen
12335525 Camaro Front Fascia
10280356 Camaro Front Grille
10193494 Camaro Front Fascia Emblem
12369966 SS Side Emblems (Silver)
9593624 WS6 Wheel
9593305 WS6 Wheel
10402860 Black Electric Antenna
GMP00F Helms manual
12369969 SS Spoiler Brake Light

These part numbers and descriptions were compiled from various sources and users at LS1.com. Their accuracy has not been validated. So, you order/use at your own risk.
Oil system GM Part numbers (from GM LS1 installation guide, PN 88959384, page 9)
Corvette (C5) Oil Pan: 12561828
Corvette (C5) Oil Pupm Pickup: 12558750
Corvette (C5) Windage Tray: 12558189
Corvette (C5) Dipstick: 12562468
Corvette (C5) Dipstick Tube: 12556405
F-body Oil Pan: 12558762
F-body Oil Pump Pickup: 12558251
F-body Windage Tray: 12558253
F-body Dipstick: 12551581
F-body Dipstick Tube: 12551577
C/K Truck Oil Pan: 12560393
C/K Truck Oil Pump Pickup: 12563961
C/K Truck Windage Tray: 12558268
C/K Truck Dipstick: 12558684
C/K Truck Dipstick Tube: 12563918
GTO (Holden) Oil Pan: 12561541
GTO (Holden) Oil Pump Pickup: 12572654
GTO (Holden) Windage Tray: 12558189 (shared with C5)
GTO (Holden) Dipstick: 12562468 (shared with C5)
GTO (Holden) Dipstick Tube: 12561544


99+ Chevy K/C truck oil pan: GM part #12560393 has been replaced by GM part #12579273! Just a note for others.

(Hope someone else finds this usefull....I couldn't find this info anywhere on the web).