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Prev Professional Automotive Repair Technical Discussions for June 21, 2010
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Open Help Requests for GM
Help Request Answers
1996 Buick Park Avenue 3.8L entry lighting VIN: 1G4CW52K7T
Thanks in advance for your help. This car came in last week and had the interior lighting fuse pulled to keep the lights from running down the battery. I replaced the fuse and started testing. If the car is running the lights never go out or if you lock the do...
1970 Chevrolet Corvette 7.4L rear camber VIN: 194370S412
Hey fellow iATNer's, We have aligned this 'Vette twice. It is now on it's way back again. The rear camber keeps moving. We set it to specs, it looks ok,drives great, two days later it comes back with the rear wheels full negative camber. It seems like the cam...
1996 Chevrolet Astro 4.3L Cuts out VIN: 1GNDM19W2T
customer complained about the van cutting out on him , had code P0748 has to do with sysytem voltage, replaced alternator but client still complains about cuting out on freeway and the same code is pending memory , any ideas , thanks Trouble codes: P0748
1997 Chevrolet C2500 Silverado 5.7L compressor VIN: 1GCGC29R8V
Can't get a command out of computer for clutch engagement, need suggestions on what to check or do next. Have exhausted my resources locally, thanks in advance. Hope everyone had a great Fathers' Day!
1998 Chevrolet Monte Carlo LS 3.1L Surge, Stall VIN: 2G1WX12K8W
I really need help on this one. The vehicle has been here four times now with the same code.. I have ran mnultiple smoke tests on the vehicle and always come up with nothing.. Last week the vehicle came in and I verified that the Evap system had some contamina... Trouble codes: P0442 (Evap system small leak detected)
1999 Chevrolet Malibu LS 3.1L MIL Lamp on VIN: 1G1NE52J4X
Car originally came in last Fall with P1133. No problems, just light. Test drove, cleared, sent her home. About a month ago, car came back. Light on, same code, no issues felt driving, etc... Another worker in the shop pulled this ticket, scanned car, dunked a... Trouble codes: P1133 (Pre-Cat Insufficient Switching)
2002 Chevrolet Silverado 1500 LS 4.8L Inst Cluster VIN: 1GCEC14V32
Came in for ipc inoperative. Tested for power and ground. All good. Replaced ipc. Still same problem. Checked cont. Fromt splice pack to cluster connector and tested good. When you tuen key on no communications with any modules. Start the truck and you have co...
2006 Chevrolet Malibu Maxx SS 3.9L Misfire VIN: 1G1ZW63186
this car has a miss on cyl 6 some misses on 2 and 4 . most of this is in mid warmup . is ok for the first 30 sec. then the the miss starts, goes to a dead miss on 6.after 30 min or so it will go to a slight miss.moved inj#6 to #4 no change on 6.moved inj wire ... Trouble codes: P0300, P0306
2007 Chevrolet Express 2500 6.0L headlights (sealed beam)
This van comes in approx. every 2-3 months with one of the headlights burned out. These are sealed beam headlights and moisture is not an issue. Both left and right bulbs burn out at different times. The last 3-4 times the van came in, the terminals in the soc...
2008 Chevrolet HHR LT 2.4L Mechanical
Hi to everybody and thanks in advance for any help. I have a customer with a 2008 Chevy HHR with what feels like a bad brake pulsation. They had the brakes replaced at another shop about 4000 miles ago and now have a bad vibration upon stopping, I machined the...
1998 GMC K1500 Sierra SLE 5.7L No Start VIN: 1GTEK19R9W
This vehicle when it is cold and sits overnight when outside temp. is below 60 degrees it takes a long time to start. When cranking you will hear a pop in the rear of the truck and then it will start. When it is started or outside temp is over 60 it starts fin...
2001 Oldsmobile Aurora 3.5L No Start VIN: 1G3GR62H81
vehicle came in with no start battery charged and has power to windows door locks radio etc NO power to starter at purple wire fuses and relays checked good key in on position security light on key in run position light goes out light does not flash did the 10...
2002 Pontiac Grand Prix GT 3.8L Poor Idle Quality, Hesitation, Stall VIN: 1G2WP12K42
Vehicle ran fine coming into shop. After tie rod replacement went to start engine and now engine bucks against starter while cranking, runs very sluggish, stalls when put into gear. I have checked fuel psi-ok and even pulled the catalytic converter down with n...
2002 Saturn L300 3.0L gear selection VIN: 1G8JW54R22
Good Afternoon, This is a fun one this saturn won't act up long enough to perform any solid diagnostics/pinpoint testing. The vehicle will start and run properly without stalling, however once in awhile the customer can't get the shifter to come out of park. ...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Riviera Luxury 3.8L Digital Dash Illumination VIN: 1G4EZ11C5K
First let me thank all for your help. This one should have been an easy fix. I noticed I only had 10.5 volts at the Central power supply, I traced it back to the fuse panel in the console. The fuse # 5 was missing, we had overlooked it when checking fuses. Ins...
2002 Cadillac Escalade 6.0L Output shaft seal VIN: 1GYEK63N02
Thanks for all the help guys. There was a pin hole about 2" back on top edge that would seep until speed was increased then it would spray toward the seal. So transfercase will be coming out
1992 Chevrolet Camaro RS 5.0L Starter,Fuel Injection VIN: 1G1FP23E6N
Hi everyone, I found out that yes indeed one of those codes will start the car, but to do so, yo have to wait about 5 minutes before you try a new combination, the e-bay by pass is pretty much useless if you don't know the value of the resistor on the key, a f...
2004 Chevrolet Silverado 1500 5.3L Mechanical VIN: 1GCEK19T14
Hey Guys! Happy Monday! Well...IT'S FIXED!!! At first we replaced the oil pump and then the timing chain, no fix, but thanks to you guys and a super patient customer we replaced the cam shaft, lifters, all seals and gaskted that come with it, and this truck ...
2005 Chevrolet Trailblazer LS 4.2L evaporator core VIN: 1GNDS13S35
I first removed the dash cover, then the whole HVAC unit comes out with the dash frame. Once separated you can replace the cores.
1996 GMC G3500 Vandura 5.7L Misfire VIN: 1GTGG35K6T
Sorry for late reply, customer uses vehicle for work and we haven't had it back for awhile. Valve adjustment was off, and this cured the problem.
1997 Oldsmobile Silhouette GL 3.4L 1-2 solenoid VIN: 1GHDX03E3V
Success!! transmission has been rebuilt and installed. vehicle is driving well and all upshifts/downshifts/tcc engagement is great. I am proud as to have rebuilt my first auto tranny. Went ahead and replaced the internal harness and torque converter as well. f...
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