GM Testing - Snap-on

Chapter 8 <strong>GM</strong>
<strong>Testing</strong> Control Systems Tests (Except ABS)
Table 8-1 2001 and earlier passenger car DTCs with multiple definitions (sheet 2 of 2)
DTCs with Multiple Definitions–Cars
DTC YEAR 4th VIN ENGINE DEFINITION
P1652
P1653
P1654
B/D/Y 4.3/5.7 Vehicle speed output circuit
1996
A/L/N/W 3.1 Fan relay #2 circuit fault
1996–97 F 5.7 Vehicle speed output circuit
1996–98 C/F/G/H 3.8 Fan relay #2 circuit fault
E/K 4.6
1996–99
Lift/dive output circuit
G 4.0
1997–2000 Y 5.7 Chassis pitch fault
1999 C/H/W 3.8 Fan relay #2 circuit fault
W 3.1
1999
Fan relay 2 & 3 circuit
N 3.4
1999–2001 F 3.8 Ride control circuit
E/K 4.6 A/C clutch control circuit
1996
All others
Low engine oil level lamp fault
1996–98 C/G/H 3.8 TCS delivered torque output circuit
1996–99 G 4.0 A/C clutch control circuit
F/W 3.1/3.8 Fuel level output fault
1998 F 5.7 Low engine oil level lamp fault
F 3.8 TCS delivered torque output circuit
1999 All others Fuel level output or low oil level lamp circuit
2000–01 All Low engine oil level lamp fault
E/K 4.6
1996–99
Cruise control disable circuit fault
G 4.0
1996–98 All others A/C relay circuit fault
W 3.1
1999
2nd gear start lamp circuit
N 3.4
1999–2000 C/F/G/H/W 3.8 Reduced engine power lamp circuit
Table 8-2 Truck DTCs with multiple definitions (sheet 1 of 2)
DTCs with Multiple Definitions–Trucks
DTC YEAR 5th VIN ENGINE DEFINITION
P1641 2000 P 6.5 MIL control circuit fault
P1642 1996 U 3.4 Air pump relay
P1643 1997–2001 All 6.5 Wait to start circuit
P1652
U 3.4 Fan relay #2 circuit fault
1996
Others - Vehicle speed output circuit
Powertrain induced chassis pitch circuit
2000 All 4.8/5.3/6.0
fault
142