Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

If the cruise control indicator works but the heated steering wheel indicator does not, then the problem does not lie with the BCM or with the LED signal circuit.
The heated steering wheel will remain ON if the heated steering wheel switch is disconnected while the heated steering wheel is ON.

Heated Steering Wheel Indicator Malfunction

Step	Action	Yes	No
Schematic Reference: Steering Wheel Schematics Connector End View Reference: Steering Wheel and Column Connector End Views DEFINITION: The heated steering wheel operates OK, but the indicator will not turn ON.
1	Did you review the Heated Steering Wheel operation and perform the necessary inspections?	Go to Step 2	Go to Steering Wheel and Column Description and Operation
2	Turn the ignition ON. Press the heated steering wheel switch. Does the heated steering wheel indicator turn ON?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Remove the SIR inflator module from the steering wheel. Refer to Inflatable Restraint Steering Wheel Module Replacement Turn the ignition ON, and press the heated steering wheel switch once. Disconnect the heated steering wheel switch. It is a grey connector on the left side of the steering wheel. Measure the voltage on the heated steering wheel switch LED control circuit with a DMM connected to ground. Refer to Circuit Testing . Is battery voltage present on the circuit when the heater is ON?	Go to Step 4	Go to Step 5
4	Measure the voltage and frequency on the heated steering wheel switch LED signal circuit, with a DMM connected to B+. Refer to Circuit Testing . Does the DMM measure 8.0 - 12.6 volts, and 130 Hz frequency, between the LED signal circuit and B+?	Go to Step 7	Go to Step 6
5	Test the heated steering switch LED control circuit for an open. Refer to Circuit Testing . Did you find and correct the condition?	Go to Step 13	Go to Step 8
6	Test the heated steering switch LED signal circuit for an open or short to voltage. Refer to Circuit Testing . Did you find and correct the condition?	Go to Step 13	Go to Step 9
7	Inspect for poor connections at the heated steering wheel switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 13	Go to Step 10
8	Inspect for poor connections at the heated steering wheel control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 13	Go to Step 11
9	Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 13	Go to Step 12
10	Replace the heated steering wheel switch. Refer to Steering Wheel Control Switch Assembly Replacement . Did you complete the replacement?	Go to Step 13	-
11	Replace the heated steering wheel control module. Refer to Steering Wheel Heat Module Replacement . Did you complete the replacement?	Go to Step 13	-
12	Replace the BCM. Refer to Control Module References . Did you complete the replacement?	Go to Step 13	-
13	Install the SIR inflator module. Refer to Inflatable Restraint Steering Wheel Module Replacement . Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3