DTC B3623, B3794, P0564, P0565, P0567, P0568, P056C, P0580, P0581, P0589,
P0592, P0593,
P155A-P155C, or P162C
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnos
CRUISE CONTROL SWITCH REPLACEMENT
Removal Procedure
1. Steering Wheel Airbag - Remove.
2.
Cruise Control Switch Bolt (1) - Remove.
3.
Using a flat bladed plastic trim tool remove the cruise contro
CRUISE CONTROL DESCRIPTION AND OPERATION (WITHOUT ADAPTIVE CRUISE
CONTROL)
DD - Serial Data - GMLAN High Speed
K20 - K20 Engine Control Module
S70L - S70L Steering Wheel Controls Switch - Left
P16 -
Cooling Fan Description and Operation
System Overview
The engine cooling fan system consists of 2 electric cooling fans and 3 fan
relays. The cooling fan relays
are arranged in a series/parallel (S/P) configuration. This allows the engine
control module (ECM) to
operate both fans together at low o