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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 1, 2013
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2005 Buick LaCrosse CX 3.8L MIL Lamp on, Reduce engine power VIN: 2G4WC53295
Scan checked for codes, got a P1516, clear the code and power comes back until it happens again. Problem happens right after cranking, engine always starts but has no power and P1516 code stores, but it is an intermmitent problem sometimes not occurring for da... Trouble codes: P1516 (TAC Position Performance), P0411 (Secondary Air Injection)
1990 Chevrolet K1500 Cheyenne 4.3L No Start VIN: 1GCEK19Z1L
This truck will eat an ignition module every 6 months or so. It's always after it sets over night; it will be running good, he shuts it off & the next AM it wont start: no spark. I have put AC Delco & Standard ignition brands both in it. He has put multiple BD...
2002 Chevrolet Silverado 1500 5.3L speedometer VIN: 2GCEK19T32
Vehicle came in with speedometer going all over the place. Checked it with scanner and I would not swipe back and forth so replaced it with good used low mileage cluster which I checked and all gauges swiped fine. Came back a week later claiming speedo would j...
2002 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 3GNEK13T22
I took a tempature before the cats and found the left one was 650 and the right was 300 so I suspected clogged cat on one side. Cut off both cats and no restriction. It seems like a jumped timing chain. I scoped the ign on the dis setting and all the paterens ... Trouble codes: P0300 (random misfire), P0106 (Map out of range)
2006 Chevrolet Avalanche 1500 Z66 5.3L brakes lock up VIN: 3GNEC12Z86
vehicle came in with brakes locking up, when master cylinder is loosen from hydrobooster the brakes free up. this was about a month ago. Replaced Hydrobooster (rebuilt), master cylinder, pads and rotors. vehicle came back with same issue brakes locking up and ...
2005 GMC Sierra 1500 SLE 5.3L unknown VIN: 2GTEK13TX5
Truck has vibration in body that starts at 45 & continues until 70 mph. We tried the wheels & tires on another vehicle & they are fine. Wheels & tires from other vehicle made no difference. Removed driveshaft & had balance checked -ok replaced rear shocks (on...
2006 GMC Envoy SLT 4.2L limp mode VIN: 1GKDT13S16
alright fellow IATN'ers.. heres the mofo of the week. 2006 envoy 4.2 comes in on a tow truck customer states that vehicle runs very poorly (which it did) and and has no acceleration which it also did). customer was in st louis for work when vehicle acted up. s... Trouble codes: P0102, P2101, P1682
2007 GMC Yukon SLT 5.3L Lifter VIN: 1GKFC130X7
My customer brought this truck to me after having it diagnosed at the GM dealership. He had a loud ticking sound in the engine normally after a cold soak. The dealership told him he needed to have all the lifters replaced. He decided to bring it to me because ...
2001 Oldsmobile Silhouette Premiere 3.4L Heater Drain VIN: 1GHDX03E71
Carpet wet on the drivers side

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille 4.6L blower motor VIN: 1G6KD54Y31
The PITA blower motor is finally installed.Special thanks to Mark,Alex,Dan for the great help getting it to go in.It did require the pading to be cut back to gain clearance and it does take alot of messing around to still get it in.
2005 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 2G2WR52445
Thanks for all the responses. The customer did not return so I have nothing further to add towards a resolution. Thanks again. The owner had exceeded the budget. Trouble codes: P0300, P0243.
2007 Saturn Outlook XE 3.6L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 5GZER13737
thanks for all input we had to release the car for now the only good thing is that the engine isn't stalling out at stops so he can at least drive it, we had already tried all the suggestion but found no leaks. Trouble codes: P0300, P0171, P0174, P0496.
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