Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN K1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1130 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESWINDSHIELD WIPER SYSTEM MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban K1500, 5.3 Z
Circuit/System Verification
2006 Chevrolet Suburban K1500, 5.3 ZSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Observe the scan tool Windshield Wiper Switch parameter while rotating the wiper switch. The reading should change between Off, Intermittent, Low, and High.
- If the Windshield Wiper Switch parameter is incorrect in the Low or High switch positions, refer to the Multifunction Switch Circuit Test and/or the Turn Signal Multifunction Switch Component Test below.
- Observe the scan tool BCM Wiper Park Switch parameter. The reading should display Active when the wipers are parked and Inactive with the wipers ON or out of the park position.
- If the Wiper Park Switch parameter is always Active or Inactive, refer to Wipers do not Park Circuit Test below.
- Connect a test lamp between the TP 1 terminal in the underhood fuse block and ground.
- Verify the test lamp turns on and off while turning the windshield wiper switch between LOW and OFF.
- If the test lamp does not turn on and off while changing between the commanded states, refer to Wiper Control Relay Control Circuit Test below.
- Ignition ON, operate the windshield wiper switch through the Delay, Low, and High positions.
- If the windshield wipers are inoperative in 1 or more of the delay settings only, test or replace the turn signal multifunction switch.
- If the windshield wipers operate at high speed while the switch is in the Low position, refer to Wiper Speed Relay Control Circuit Test below.
- If the windshield wipers operate at low speed while the switch is in the High position, refer to Wiper Speed Relay Control Circuit Test below.
- If the windshield wipers are inoperative in the Low or High switch positions, refer to Wiper Motor Circuit Test and/or the Wiper Motor Component Test below.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.