Category: Hummer

4.8L, 5.3L, 6.0L GM Truck rough idle? Trouble Codes PO300, PO171, PO174 and PO332? 25

4.8L, 5.3L, 6.0L GM Truck rough idle? Trouble Codes PO300, PO171, PO174 and PO332?

These two conditions seem to be very common, and requires similar repair procedures (removal of the intake manifold). Gm has recognized these problems and has issued a parts revision and TSB (Technical Service Bulletin)...

How To Diagnose and Fix Hummer Air Ride Suspension Components 33

How To Diagnose and Fix Hummer Air Ride Suspension Components

Vehicles Affected:  2003-2009 Hummer H2 w/ Rear Air Suspension System Tools Needed: Basic Hand Tools Parts Needed: Air Suspension To Coil Spring Conversion Kit or Air Suspension Bags/Compressor & Components Problem: The 2003-2009 Hummer...

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