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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 811 (CRUISE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCRUISE CONTROL INOPERATIVE/MALFUNCTIONING (L61)CONDITIONS FOR ENABLING CRUISE CONTROL
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Conditions for Enabling Cruise Control

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Conditions for Enabling Cruise Control
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  • The vehicle speed is greater than 40 km/h (25 mph).
  • The vehicle is not in PARK, REVERSE, NEUTRAL, or 1st gear.
  • The system voltage is between 12 volts and 16 volts.
Cruise Control Inoperative/Malfunctioning (L61)

Step Action Yes No
Schematic Reference: Cruise Control Schematics (3.0L)  or Cruise Control Schematics (2.2L) 
Connector End View Reference: Cruise Control Connector End Views 
1 Did you perform the Cruise Control Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Cruise Control 
2
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Turn the cruise control On/Off switch OFF.
  4. With the scan tool, observe the Cruise Switch parameter in the ECM General Info - Inputs data list.
Does the cruise switch parameter display Off?		 Go to Step 3  Go to Step 6 
3
  1. With the scan tool, observe the cruise switch parameter.
  2. Turn the cruise On/Off switch ON.
Does the cruise switch parameter display On?		 Go to Step 4  Go to Step 7 
4
  1. With the scan tool, observe the cruise set/coast parameter.
  2. Press and hold the Set/Coast switch.
Does the cruise set/coast parameter display On?		 Go to Step 5  Go to Step 9 
5
  1. With the scan tool, observe the cruise resume/accel parameter.
  2. Press and hold the resume/accel switch.
Does the cruise resume/accel parameter display On?		 Go to Diagnostic Aids Go to Step 10 
6
  1. Turn the ignition OFF.
  2. Disconnect the cruise switch.
  3. Turn the ignition ON, with the engine OFF.
  4. Observe the cruise switch parameter.
Does the cruise switch parameter display Off?		 Go to Step 13  Go to Step 11 
7
  1. Turn the ignition OFF.
  2. Disconnect cruise switch.
  3. Turn the ignition ON, with the engine OFF.
  4. Connect a test lamp between the ignition 1 voltage circuit and a good ground.
Does the test lamp illuminate?		 Go to Step 8  Go to Step 15 
8
  1. Connect a 3 ampere fused jumper between the ignition 1 voltage circuit and the cruise control on switch signal circuit.
  2. With the scan tool, observe the cruise switch parameter.
Does the cruise switch parameter display On?		 Go to Step 13  Go to Step 12 
9 Test the cruise control set/coast switch signal circuit for a short to ground, for an open, or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 13 
10 Test the cruise control resume/accel switch signal circuit for a short to ground, for an open, or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 13 
11 Test the cruise control on switch signal circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 14 
12 Test the cruise control on switch signal circuit for an open, for a short to ground, or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 14 
13 Inspect for poor connections at the harness connector of the cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 16 
14 Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 17 
15 Repair the short to ground, the open, or the high resistance in the ignition 1 voltage circuit. Refer to Wiring Repairs Wiring Systems.
Did you complete the repair?		 Go to Step 18  -
16 Replace the cruise control switch. Refer to Cruise Control Switch Replacement .
Did you complete the replacement?		 Go to Step 18  -
17
IMPORTANT: Program the replacement ECM.
Replace the ECM. Refer to ENGINE CONTROL MODULE .Did you complete the replacement?		 Go to Step 18  -
18
  1. Enable the inflatable restraint steering wheel module. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM in SIR.
  2. Operate the vehicle with in the conditions for cruise control operation.
Does the cruise control system operate properly?		 System OK Go to Step 2 
RENDER: 1.0x

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  • • The engine overheats, stalls repeatedly, or misfires under load.
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  • • You are not confident in the next step or safety outcome.