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#1
02-04-2011, 11:08 AM
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4x4 High makes grinding noise and pulls left
I own a 2005 Z71 Avalanche 1500 with 125K miles that I've had since new. When I engaged the four wheel drive high, it has an a loud grinding noise and pulls to the left on dry pavement. When I drive over ice or snow, the noise and pulling immediatly stops. This truck has the 2wd/Auto 4wd option and it has always been driven in 2wd only.
Any guidance or suggestions is appreciated. 
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#2
02-09-2011, 10:35 AM
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Re: 4x4 High makes grinding noise and pulls left
Sounds like the left hub of the front axle isn't fully locked up. Check the front 4wd actuator. I don't know if it is vacuum-actuated like the older trucks or via solenoid.
If vacuum, check the vacuum actuator's diaphragm for holes and vacuum lines for leaks. If solenoid, check for poor electrical contact and grounds. Hope this helps!
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Current Garage: 2009 Honda CR-V EX 2006 Mazda 3i 2004 Chevrolet Silverado 2500HD 2003 GMC Envoy XL 2000 Honda ST1100 2000 Pontiac Sunfire Vehicle History: 2003 Pontiac Vibe AWD - 1999 Acura Integra GS - 2004 4.7L Dakota Quad Cab 4x4 - 1996 GMC Jimmy 4wd - 1995 Chevrolet C2500 - 1992 Toyota Camry LE 2.2L - 1992 Chevrolet S10 Ext. Cab 4.3L - 1995 Honda ST1100 - 1980 Yamaha XS400 - 1980 Mercury Bobcat.
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