User's Manual

5
4.2 YOU SHOULD GET TO KNOW THE PARTICULAR ENGINE YOU ARE USING:
NOTE: The 2005-2006 LS2 engines had four oxygen sensors from the factory. We have included
provisions for only two oxygen sensors, which include one on the driver side and one on the
passenger side of the engine. We have removed the two rear oxygen sensors since they
originally where behind the catalytic converters and most people don’t want to run more
than two oxygen sensors.
4.2.1 PPPI recommends the use of the following parts. See Table 4.1 for 60520-21. These will meet all
requirements and are compatible with PPPI harnesses. The numbers given are GM and AC Delco
part numbers.
4.2.2 Familiarize yourself with the harness by locating each of the harness groups and by looking at the
connectors on the wire ends.
4.2.3 Decide where and how the computer, fuse block, TAC module, accelerator pedal and fuel pump
relay will be mounted. PPPI wire harness kits are designed to mount either under the dash or in the
kick panel on the passenger side. They must be no further apart than the wiring will allow (approx.
18 inches).
4.2.4 A good exercise is to lay out the wire harness on the floor beside your vehicle and identify all the
connectors and wires.
4.2.5 You will want to route the harness through and around open areas. Inside edges provide extra
protection from hazards and also provide places for tie wraps, clips and other support.
4.2.6 Route the harness away from sharp edges, exhaust pipes, and the hood, trunk and door hinges.
4.2.7 Plan where harness supports will be located. Use a support approximately every 6 inches unless
the harness routes under the floor carpet.
4.2.8 Allow enough slack in the harness at places where movement could possibly occur (body to frame,
frame to engine, etc.).
4.2.9 The wires should be bundled into harness groups and covered for protection. Use nylon ties, poly
split loom or POWERBRAID.
Table 4.1 60520-21 Compatible Parts
LS2 Fuel Injection Harness (‘05-‘06) Part # 60520 & 60521
Main Computer…………………Service #12200411
Fuel Pump Relay………………..Delco# 15-8240
Brake Switch…………………….Delco# D850A
Gear Indicator Switch…………...Delco# D2286A
MAF/IAT Sensor………………..Delco# 213-364
GM# 25318411
Engine Coolant Temperature……Delco# 213-953
GM# 15326388
Oxygen Sensor (Pass&Drvr Side) Delco# AFS75
GM# 25312184
MAP Sensor…………………..…Delco# 213-331
GM# 16212460
Oil Pressure………………………GM# 12573107
Knock Sensors (Pass&Drvr Side) Delco# 213-362
GM #10456603
Coils…………………….…..…....GM #12570616
GM# 12573190
Cam Position Sensor……………..GM #12568983
Crankshaft Position Sensor………GM #12560228
Delco# 213-354
Throttle Body………………....….GM# 12570790
TAC Module……………….….....GM# 12578953
Cruise Control Switch………....…GM# 25111262
Accelerator Pedal………….……..GM# 12565643