Loc: Fort Morgan, CO
05-21-12 09:28 PM - Post#2228455
I need some major help. I have a 2006 GMC 3500, CC/LB, 6.0 gasser, this is my service truck. Its tossing a P2135 code at random, I replaced the throttle body and checked the connection there, they both looked good. Still throws the code with the new TB, did a little research about some grounds on the back of the heads, and certain fuses maybe being weak and causing it, but I'm way too busy to tear the truck apart so I'll carry my code reader with me but any help would be much appreciated. Thanks
"9th Year" Silver Supporting Member
Loc: DFW TEXAS
05-22-12 01:58 PM - Post#2228685
In response to Colohayhauler
There was a serice bulitian about a broken cable on models up to 2004. It may be the same area. Is there an area where the harness to the throttle position sensor may flex excessively from engine movement?
SES Light and Reduced Engine Power with a DTC P1516: DTCs P0120 , P0220 , P1514 , P1515 , P1518 and P2135 May Be Present; 04 Trucks and Utilities with GENIII V-8 Engines - kw 4.8 5.3 6.0 #PIP3089 - (Jul 30, 2004)
SES Light and Reduced Engine Power with a DTC P1516: DTCs P0120, P0220, P1514, P1515, P1518 and P2135 May Also Be Present
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
SES light and reduced engine power with a DTC P1516. DTCS P0120, P0220, P1514, P1515, P1518 and P2135 may also be present.
If the SI diagnostics do not isolate the cause, inspect the Yellow TAC Motor Control Circuit (581) about 1 inch to 4 inches from the throttle body connector to see if it is broken inside of the insulation. Repair as necessary.
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