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Prev Professional Automotive Repair Technical Discussions for December 20, 2012
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Open Help Requests for GM
Help Request Answers
1986 Chevrolet Celebrity 2.5L Master cylinder VIN: 1G1AW19R4G
This one is gonna sound stupid but it's been a while since I've worked on something this old, this vehicle came in with no brakes, the front rotors were worn down so bad that the brake pads fell out and the pistons popped out of both front calipers, put all ne...
1998 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCC144X1W
This one has me baffled badly. No trouble codes, no misfires, runs great, no pinging, no overheating, fuel trim is 0 , new o2 sensor fluctuating quickly, add a little propane and nox goes to zero. What the hell am i missing?! i feel like i am chasing my tail! ...
1999 Chevrolet Tracker 2.0L Mechanical VIN: 2CNBE18C4X
i am reposted this auto. it came in with severe engine vibration when put in gear. thought i fixed it. i found timing was off one tooth. chain was loose. put new timing chain and geats and tenior on. now vibration is worst. so mitchell does not show oil pump h...
2004 Chevrolet Suburban 1500 Z71 5.3L cluster intemitant VIN: 1GNFK16Z04
The dash gages work at times. when I got it all gages were all stuck at various positions with no odometer reading. No lights came on when the key was turned on. I removed the cluster and tested battery and ignition power circuits and one ground-all OK, plugge...
2004 Chevrolet Silverado 1500 5.3L Suspension VIN: 2GCEK19TX4
Loud poping noise in suspension cat,t find
2005 Chevrolet Trailblazer EXT LT 4.2L Differential
Is there an easy way to removed front differental have it unbolted the shaft that passes through the oil pan is removed. seems like plenty of room but need a hint thanks
2008 Chevrolet Suburban 1500 LTZ 5.3L Misfire, MIL Lamp on VIN: 3GNFK16378
Customer was driveing , when ses lite, trac control lite, abs lite came on, engine started running bad.scanned ecm , found po306 , only . We checked #6 plug was fuel fouled, changed plug, no change. Did running and static compression, 50# & 150# respectfully. ... Trouble codes: P0306
2012 Chevrolet Malibu LT 2.4L Misfire VIN: 1G1ZD5EU0C
Vehicle came in with misfire. After checking we realise the misfire is on cylinders 1 and 3. While cranking injectors 1and3 will pulse, once the vehicle starts both injectors will stop pulseing. I,m useing Ease scan tool.
2003 Hummer H2 6.0L power steering VIN: 5GRGN23U73
Thanks for your help in advance. I have this H2 in my shop that feels like it has little to no power steering sitting still regardless of engine rpm, as soon as the truck starts moving the steering feels fine. This truck has is equipped with hydro boost. Now w...
1999 Pontiac Sunfire SE 2.2L Misfire VIN: 1G2JB1244X
cuts out above 4000 rpms begins to misfire and then blind up like clogged cat but back pressure is good/fuel prssure is with in specs and has good flow

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54K9Y
All I have to say is THANKS to ALL who replied. A few of you hit it on the head and it was too obvious that I am kicking myself in the butt!!! The positive terminal to the starter was corroded. This one is fixed and gone!!!
1970 Cadillac DeVille 7.7L mode switching VIN: L026984533
Thanks for the help guys- the controller has been sent out for a rebuild- that should be the final issue but if not I will add info if and when available. Greg and crew
1998 Chevrolet S10 LS 4.3L master cylinder VIN: 1GCESTFX5W
Fixed. I will give the prize to Sadler from NY. I pushed the front calipers in and then went to the rear and finally got fluid. Bleed it then a couple automated bleeds and bleed again. Gret pedal- thanks guys.
1996 Pontiac Grand Am GT 3.1L engine VIN: 1G2NW52M6T
Thanks to everyone who replied. Received some good information. We replaced the oil pump drive to see if that took care of the problem. Nose still there unfortunately. Customer picked up car and is driving it as is and will return at later date to hopefully de...
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