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Prev Professional Automotive Repair Technical Discussions for October 13, 2009
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Open Help Requests for GM
Help Request Answers
1999 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y3X
car came in running. the message display read anti thieft problem car may not start. there is no communication with any moduals. i checked the class 2 data line and there is 8 volts all the time. i replaced the pcm, now the car will not start and all symtoms a...
2003 Cadillac Seville STS 4.6L ride control VIN: 1G6KY54943
vehicle has intermittant service suspension system data in driver information center. sets randome codes for all four dampners in the shocks and struts. cleaned all conections at struts but still have code c0582 right front acuator circut low. can not duplicat...
1999 Chevrolet Malibu 2.4L Instrument panel illumination VIN: 1G1NDT52T4
Originally came in for no dash lights condition. I traced problem to the dimmer module under the instrument panel, mounted on a brace. Replaced module, lights worked 1 week.2nd Replacement module from dealer did not work- right out of the box. Thought I missed...
2000 Chevrolet Silverado 1500 LS 5.3L encoder motor VIN: 1GCEK14T8Y
hello fellow techs, i have replaced 2 encoder motors for co308 code. each time i replaced it, it was fine for at least 1 day. customer states he didnt use 4wd and the light was back on with code c0308 again. checked motor circuit resistance ok at .3 ohms at th...
2004 Chevrolet Silverado 2500 HD 6.6L excessive smoke VIN: 1GCHK23104
Thanks for the help. I have this truck here that smoke after it idles for a while. If you drive it, it will clear up. The smoke color is grayish bluish. After it sits a whole night it has a long crank. The tail pipe is full of black soot. Im leaning twards inj... Trouble codes: P0380
2007 Chevrolet Tahoe LS 5.3L Mechanical VIN: 1GNFC13JO7
Things that should be sooo simple sometimes can boggle the mind and thats where I am right now. I have this Tahoe that customer brought in with complaint of low oil pressure and oil light coming on. verified complaint on short test drive. Has low oil pressure ...
1993 GMC C6000 Topkick C6H042 6.0L Poor Idle Quality, Surge, Cuts out VIN: 1GDJ7H1P8P
need some fuel pressure specs on this truck my shopkey does not have the info(we normally do not work on these but he is a very good customer)poor idle no power and lean condition Trouble codes: 44 (lean)
2005 GMC C4500 Topkick C4E042 8.1L Hesitation VIN: 1GDE4C1E55
This truck came from another shop.On the road when accelerating,motor will go to 2,000 rpm then stay there.Floor the throttle and it won't go past 2,ooo rpm.No engine or trans codes.When checking tac data both app sensors agree and both tps values agree.With k...
2006 GMC Sierra 3500 SL 6.0L air bag light VIN: 1GDJK34U66
The SERVICE AIR BAG message is on the I.P. If you turn off the passenger side air bag the message goes out. It has code B0090 in it.(ACTIVE SWITCH VOLTAGE OUT OF RANGE.) I went down the trouble chart and it lead to the (I.P.module disable switch) I replaced th...
1997 Oldsmobile Aurora 4.0L No Start VIN: 1G3GR62C0V
Came in as a no start found plugs flooded replaced ran for about 2 minutes then wouldn't restart. Determined we had a foriegn fluid in the fuel. removed all the fuel via the fuel pump. Put fresh fuel in still no start. Seems to keep flooding plugs for some rea...
1998 Oldsmobile Aurora 4.0L Cuts out, Stall VIN: 1G3GR62C3W
This car came in stalling after driving for over 20 miles. It will stall at idle only. I did get it to act up once with throttle pressure, but the RPM was still below 1200. When the stall occurs, the 24x and 4x signals from the ICM to the PCM stop pulsing. Th... Trouble codes: P1599 (Engine Stall or Near Stall Detected)
1993 Pontiac Firebird Trans Am 5.7L Hesitation, VIN: 2G2FV22P4P
i have a problem the fuel tank is making to much presure i replaced the presure control at the charcol canister and purge solinoid all seems to be working as for solinoid when driven for a wile can smeell fuel stop can hear vapor presure at fuel cap release ca...
1999 Pontiac Grand Am SE 3.4L No Start, Stall VIN: 1G2NE52E0X
What is happening to this car is weird , I never run into something like that before , here is the problem ; the car runs very good , idles very good , but after going to the gas station to put gas , put some gas in in the tank ( not neceserally full) , and ...
2000 Pontiac Montana 3.4L Surge, Cuts out, Stall VIN: 1GMDX03E5Y
Vehicle came in with complaint of intermittent surge and stall. Verified complaint and noticed at time of occurance that Tach would jump all over the place. checked all grounds and power sources for good connections. Replaced both crankshaft sensors and camsha...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal GS 3.8L Coolant Level Ind. VIN: 2G4WF521XW
Thank you everybody for the replies. The problem went away when the NAPA coolant level sensor was removed and an OEM sensor was installed. At the same time a heater hose was removed and the thermostat housing vent was opened when the cooland was added back i...
2001 Buick Regal GS 3.8L Intake Manifold VIN: 2G4WF55141
All of you that said lower intake gasket are right!! I quoted the customer worse case for lower intake gasket, I tore it all down and sure enough the middle intake coolant ports were shot just like all the other intake gaskets on GM vehicles. I wasen't sure of...
2005 Buick Century Limited 3.1L heater VIN: 1GBHC24U45
hi technician i fix this car,change the blend door motor,i apreciate to all of you for your help thanks very much.
2003 Cadillac CTS 3.2L steering angle sensor VIN: 1G6DM57NY3
1985 Chevrolet S10 2.5L No Start, Stall VIN: 1GCBS14E7F
Well i would like to thank everyone for the help. Some reply's made no sense at all. I was suspecting the reman distributor to have a defect in it, so i was gonna order a new one instead of reman. Few and far inbetween on them. Ordered another reman(readilly a...
1985 Chevrolet K20 Custom 5.7L engine block VIN: 1GCGK24M4F
I tried heating the pins and letting them cool to remove the hardness, it didn't work. I took a couple of regular bolts, not head bolts, cut off the heads and used them as guide pins. It worked great...
1988 Chevrolet C2500 Silverado 5.7L Cuts out VIN: 2GCFC29K0J
well thanks to all the truck is now running fine. I changed the distm with a brand new one and still nothing so we changed the computer and that was what it seems to be so far all is good. Thanks to all who helped.
2000 Chevrolet Express 3500 6.5L No Start, Interm. Long Crank VIN: 1GCHG35F8Y
It was a bad PMD module. I put a remote one in that was located to a much cooler environment. Look up Stanadyne's website for their "Bullet Proof" DS Pump Mounted Driver.. Thanks for the six replies. Arne Trouble codes: P0380 (Glow Plugs intermittently).
2002 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GCDM19X2B
Vehicle left shop with no light and no codes, replaced gear again with new GM one. Feel confident that camshaft replacement would prevent repeat failures, but customer has opted to replace gears as needed rather than get into cost associated with new camshaft.... Trouble codes: P1345.
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