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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 5, 2019
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Open Help Requests for GM
Help Request Answers
1997 AM General Hummer 6.5L injection pump VIN: 137ZA8433V
Hi guys I needed some help with locating labor times for replacing high pressure pump gasket and front top gear cover gasket, may be part of water pump assembly? I had a beautiful spiral bound h1 book that seems to have grown legs so im having trouble maki...
2002 Chevrolet Tahoe LS 5.3L Mechanical VIN: 1GNEK13Z32
vehicle came in with 1st and 2nd gear only. dissembled trans and found 3/4 clutches burned up. everything else in trans looked new. customer pulls trailer over a mountain regularly. after talking with him he doesn't pull it into 2nd or 3rd he just lets the...
2006 Chevrolet Suburban 1500 Z71 5.3L MIL Lamp on, Reduced engine perf VIN: 1GNFK16Z66
Customer stated the vehicle has a check engine lamp on and the engine goes into a reduced performance mode as well. Upon arrival, found the vehicle not in reduced performance mode. Checked for codes and found the codes listed. Vehicle has had many repairs ... Trouble codes: P0120 (TP or APP sensor 1 circuit problem), P1516 (Throttle Actuator Control Module VS Throttle Actuator Position Performance), P2135 (TP Sensor 1-2 Correlation)
2008 Chevrolet Silverado 1500 WT 4.8L Engine VIN: 1GCEK19C78
When pickup came in complaint was oil light and message-Stop engine low oil pressure.We pulled the oil pressure sensor put in manual gauge warmed engine up pressure was 12 psi hot at idle in gear.We changed oil with 5/30 and put on UPF48R delco oil filter ...
1969 Pontiac GTO 6.6L water pump
Does anyone know what the 2 small, blue sleeves in this Fel Pro timing cover set #TCS-45166 are for? The packaging indicates they are water pump mounting sleeves but I can find nothing to show where they go. I just want to do this right and these old gals ...
1998 Pontiac Grand Prix GTP 3.8L Hesitation, MIL Lamp on VIN: 1G2WP1210W
Hi guys vehicle came into my shop and the customer said the s.e.s. Light on. Though when he brought it in the light was out. I ask the customer if he had any drivability issues. He said it he experinced hesitation upon acceleration, though intermittenly. H... Trouble codes: P0102
2001 Pontiac Firebird Formula 5.7L Alternator VIN: 2G2FV22G91
Replaced alternator when new water pump was installed, battery was replaced the week before. Alternator was replaced for intermittent no charge and because the bearings were making noise. After replacing alt, water pump, thermostat, belts, tens., idlers, a...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Buick LaCrosse CXL 3.8L Poor Idle Quality, Reduced Power VIN: 2G4WD582X7
Well . . . This gets the 'Huh' award. After I went home my boss started looking at it. Don't remember if it was last night or this morning but he had performed the APP relearn and everything has been fine. No failures. Nada. Zip. Now I had performed the ... Trouble codes: P1516 (Electronic Throttle Module vs Throttle Position Performance).
2001 Chevrolet Express 1500 4.3L Misfire, Misfire
Thanks so much to everyone who responded. We got lots of ideas to try when the customer was to return. Unfortunately, he didn't: it was a service truck and he needed to get back on the road to make some money. We called him a week later to see if he could... Trouble codes: P0304 (Cylinder 4 misfire).
2005 Chevrolet Silverado 2500 HD LS 6.6L Shift quality
Thank you to all who replied. We did some testing of the solenoids. Due to the age and availability of parts, the owner decided to replace them all. This corrected the issue. The owner states that the truck has never shifted so well in the ten years he owne...
2009 Chevrolet Traverse LS 3.6L MIL Lamp on VIN: 1GNEV13DX9
OK this was a screwed up mess.Code definition for PO192 on Snap-on scanner and on Alldata is fuel rail pressure sensor low voltage.There is also a fuel line pressure sensor and that is where the problem was.The signal wire from line pressure sensor to the fue... Trouble codes: P0192.
2013 Chevrolet Silverado 2500 HD LT 6.0L Reverse Lights VIN: 1GC1KXCG0D
This vehicle must be running for the software to turn the reverse lights on. THANKS MATTHEW! I and the engineers were thinking differently today. And Dan, the regs say "REJECT IF... an exterior bulb, if originally equipped, fails to light." They ALSO need ...
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