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Prev Professional Automotive Repair Technical Discussions for January 21, 2013
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal Custom 3.1L Fuel Pump VIN: 2G4WB52M9S
Fuel pump will not energize with key on, when you apply voltage to fuel pump test terminal, fuel pump is energized. Fuel pump will receive voltage thru oil pressure switch during extended crank times and vehicle eventually starts. After removing fuel pump rela...
2003 Cadillac CTS 3.2L MIL Lamp on VIN: 1G6DM57N63
Ok '03 CTS with p0336. I have put multiple crank sensors in this thing(a/c delco sensors). Code resets, not right away but prob takes a few days to reset. I did a wiggle test to check harness, seems ok. I checked crankshaft endplay which seemed to be ok. The c...
2000 Chevrolet Venture 3.4L Stall VIN: 1GNDU03EXY
have done tons of work on van. new module,coils crank shaft sensor map, mass air flow sensor, upper and lower intake gaket.plug, wires. this thing bogs and then dies, coughs. no codes other then inter. u1040. no misfires. put spark tester on it after it dies, ... Trouble codes: U1040
2004 Chevrolet Malibu LT 3.5L Left Rear Seat Belt VIN: 1G1ZU54864
How do I remove the rear window trim panel so I can access the seat belt retractor?
2005 Chevrolet Tahoe LS 5.3L code C0327 VIN: 1GNEK13TX5
Need some help with this on guys. This tahoe sets a code C0327 interm. May be fine for a few days and then service 4wd message wil show up and code C0327 set. We have serviced tons of these and I have only replaced 1 encoder motor, and a ton of switches on the...
2007 Chevrolet Suburban 1500 LT 5.3L Rear liftgate
Got one for you Good Wrench dealer guys.Replaced the rear liftgate module in this '07 Suburban and programmed with my Tech2. Liftgate will work when commnded by Tech2 but will not work by the button. Scanner data shows the module sees the button properly. If y...
2008 Chevrolet Silverado 1500 WT 5.3L base brakes VIN: 2GCEC13J08
thanks in advance! hi vehicle came in shop with noise in rear end . found rear brake shoes worn and brake drums out of round .resurfaced drums and replaced brake shoes and every thing was ok. truck returned at a later date customer was complaning about brake p...
2005 GMC Yukon XL 1500 SLT 5.3L brake pedal VIN: 1GKFK16Z95
when applying brakes slow brakes work fine, but if you push the pedal down fast it feels like the pedal pushes back at you for a second and then work fine. have pulled abs fuse to rule out the abs system. the problem will happen even if your just idling in par...
2006 GMC Savana 3500 6.6L Hesitation, Cuts out, MIL Lamp on VIN: 1GTHG352X6
truck came in with code- after three test drive got van to act up- at 65 -70 under load the van lost preforance pedal to floor no power- computer taking fuel away as desiered. found the turbo van control solinoid sticking at times- replaced- test drove no prob... Trouble codes: P0234
2007 GMC Sierra 1500 SLT 5.3L stereo VIN: 3GTEC13J17
stereo turns on sound only comes from tweeters till it warms up then works fine not sure what may cause this but the stereo will work in all modes durring the time it only makes sound out of the tweeters any help would be great thanks larry's auto
2005 Hummer H2 6.0L Ignition Lock Cylinder VIN: 5GRGN22U65
Ign key will not release all the way to the off position at times. I can hear a solenoid in the steering collumn that actuates when the shift lever button is RELEASED, allowing the key to be removed. Information system has 'nodata' in the starting or steering ...
2003 Pontiac Grand Am SE 3.4L Injectors not opening VIN: 1G2NF52E33
I have a 2003 Grand Am GT 3.4l V6 in the shop. Customer stated the car would not start. We checked the plug wires and they were fine. We sprayed carb cleaner into the throttle body and the car would start. We then replaced the fuel pump and filter, thinking th...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Chevrolet Trailblazer North Face 4.2L Dome Light, Radio, Power Locks VIN: 1GNDT13S73
Well, I finally punted because I just couldnt spend anymore time on this one. I wish I could have updated post more than once. The door inputs were ruled out as a cause of problem and so was the radio. Sent car to dealer who reported to me that the airbag modu...
1997 Geo Tracker 1.6L Code VIN: 2CNBE1865V
unfortunately When I posted this the customer picked up and has not brought back yet. I will add fix as soon as i get car back. although thank you for all info. Trouble codes: P0400.
2003 GMC C5500 Topkick C5C042 6.6L speed governed at 35 VIN: 1GDE5E1173
The truck is fixed except for the radio locking. The speed limiting was the same problem we suspected in the first place but it wouldn't take the new axle ratio and revolutions per mile info until attempted a few times. We got our hands on a Tech 2 and did the...
2003 GMC Envoy XL SLT 5.3L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GKET16P93
Thanks for all the help. It turned out to be intake gaskets after all. I never found leak before disassembly even after smoking intake and spraying an entire can of carb cleaner around intake ports. Thanks again. Trouble codes: P0171, P0174, P0300.
2007 GMC Acadia SLE 3.6L ride VIN: 1GKER13747
Thanks for all your help. Your ideas gave me confidence to have the transmission replaced & all the problems were gone. One note to mention, i didn't realize the tcm is internal to the transmission & is not programmed as i found out when i cranked the engine ...
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