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Prev Professional Automotive Repair Technical Discussions for June 16, 2008
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Open Help Requests for GM
Help Request Answers
1993 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5312P
hello friends, this one came in with a check engine light that comes on intermittantly while driving but always when in reverse. it is a qdm b dtc which is related to the boost solenoid, egr 2 and 3 solenoids, trans shift sol a and b, and trans tcc pwm solenoi... Trouble codes: 56 (qdm b)
1995 Buick Riviera 3.8L hard/no start VIN: 1G4GD22K4S
I think I have a ECM issue but need some experience. We are a Ford store and am fixing this for a good customer. We could not communicate with this vehicles OBD2 style connector. The new plugs are fuel fouled again. It started right up after the plugs were rep...
1997 Cadillac Eldorado ETC 4.6L No Start VIN: 1G6ET129XV
Hope a Cadillac tech can help me!!. I have a customer's 97 eldorado, low mileage nice car that came in on the hook for a no start and possible theft module problem. we could not communicate with any modules with the tech 2. After many hours of digging, we conc...
1997 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y4V
well first i would again like to thank all for the previous help on this one. i thought all was well on this vehicle after cam timing set properly. we had been fighting a p0340 code. i was performing final test drives to verify repairs when cel light popped on... Trouble codes: P1139 (ho2s insufficient switching bank 1 sensor 2 pre-converter), P1140 (ho2s transition time ratio bank 1 sensor 2 pre-converter), P1571 (traction control system pulse width modulated circuit no frequency), P1632 (theft deterrent system fuel disabled)
2003 Cadillac CTS 3.2L Rotors,Pads VIN: 1G6DM57N03
Hi, We installed new rotors and pads due to pitted ,rusted rotors,the caliper pistons pushed in very easy. We closed for a weeks vacation ( yes the cruise was nice). This morning vehicle came in and client said he started having smoke from front right wheel. H...
1991 Chevrolet Cavalier Z24 3.1L No Start VIN: 1G1JF14T3M
car came from another shop. no start. only have injector pulse while cranking. will start and immediately stall. can keep running with fuel but have no injector pulse. any help please. thank you
1994 Chevrolet S10 4.3L knock VIN: 1GTDT14Z7R
Hey Techs! this s-10 4x4 came in on monday. customer complains of knock/bang on right turns only. Left turns appear to be fine. (must be an old nascar truck...lol)Claims he hit a big bump after the Jimmy Buffet concert on sat night. Verified this by road test...
1995 Chevrolet K1500 5.7L Cuts out VIN: 2GCEK19K0S
This pickup came in with no power 55mph is top end. Pickup runs fine and doesn't miss. Exhaust is clear from manifolds to tailpipe. I replaced fuel pump and filter. Checked timing and it was on and the advance is right. It doesnt heat but it is dead and wont e...
1998 Chevrolet Express 3500 LS 5.7L Poor Idle Quality, Surge, MIL Lamp on, low power VIN: 1GNHG35R6W
Hello guys, and thanks for looking at this one. First off the van came in with a CEL and low power. Test drove van and seen the O2 sensors on both banks were reading lean under acelleration from a stop. 200-350mv, and noticable low power. However if you are go... Trouble codes: P1153 (bank 2 sesnor1 not switching)
1999 Chevrolet Tahoe 5.7L Takes off in o/d VIN: 1GCEC14683
Bear with me here. This is my wifes Tahoe. We send all our transmission jobs out to a local trans shop that we have used for the past seven years with no problems. These guys are very compentent but, this one has eaten their lunch. I thought it was taking off ...
2000 Chevrolet S10 4.3L Poor Idle Quality VIN: 1GCCS19W7Y
Truck has a lean startup problem, extended crank time cold, acts like low fuel pressure. Pressure pegs 62 lbs KOEO, 56 - 58 lbs cranking. Have replaced numerous items as listed above and still have lean problems cold. Also forgot to mention PCV has been replac...
2001 Chevrolet Blazer LS 4.3L Surge, Cuts out VIN: 1GNDT13W41
hello all i have a s-10 blazer that is surging at cruise speeds in overdrive.if you let off of the gas or get into it at all the surge goes away.the rpms drop from about 2000 to 1200.back and forth till it clears up.there are no codes.it feels like its engine ...
2001 Chevrolet Corvette 5.7L Reverse VIN: 1G1YY32G91
Transmission will pop out of reverse unless you put pressure on the shifer while releasing clutch. If you don't do that it'll grind and pop out of gear. All other gears are OK. Any history of bent shift forks, shift tube, or ??? We have the console out and che...
2003 Chevrolet Trailblazer LTZ 4.2L inst. cluster VIN: 1GNDS13S83
Customer states that the inst. cluster intermittently goes off while driving(just like when key is turned off). It will usually start working again after it has sat turned off for a while.(2-3 hours). It has never acted up for us, even while wiggling looms, ec...
2004 Chevrolet Silverado 1500 LS 5.3L transfer case VIN: 2GCEK13T14
I am lost and I need help finding my way!! This truck came to me a few months ago for a service 4wd light. It had a code C0327 so I reflashed all was well. Now customer went to use 4wd, light would blink then go back to 2wd.[Truck has 2 speed active 4wd with 4...
2006 Chevrolet Malibu LT 3.5L steering VIN: 1GIZT61896
car came in for steering vibration and we balance and rotated 4 wheels. same thing. customer stated that it does'nt happen constantly. sometimes once a week. it has electronic steering. we checked for loose suspension components and everything looked good. no ...
1983 GMC S15 Jimmy 2.8L No Start VIN: 1GTHEYUIOP
I have a problem where the ignition module keeps burning out, runs for about 5 minutes, had new distibutor 1 year ago, 800 ohms on pick-up coil; Has anybody ran into this? Thanks very much for any help given.
1996 GMC G3500 Magnavan 5.7L a.c. VIN: 1GDHG31K1T
G.M. Techs your knowledge is needed.Bus came in with bad compressor.Replaced it along with new receiver drier and orfice tube,replaced rear expansion valve, flushed entire system even subletted big condensor for radiator shop to flush.At idle will not cool,spr...
1999 GMC K1500 Suburban SLE 5.7L powersteering VIN: 3GKFK16R4X
Hi i have a 99 gmc suburban k1500 having some steering issues. Truck came in with no power steering at all. So we replaced the the pump. After the installation the power steering starting working. On my test drive i did notice that with the brakes applied and ...
2007 GMC Yukon XL 1500 SLE 5.3L tpms VIN: 1GKFK16357
Okay, where to begin? This truck came to us about two weeks ago for a standard Lof/Rotation. We put the truck in re-learn through the Dic (dash controls), got out our OTC to find it wasn't updated far enough. Just attempted Re-learn through Dic and heard both ...
1999 Oldsmobile Cutlass GL 3.1L No Start VIN: 1G3NB52M1X
on 6-10-08 customer brought car in complaining of hard starting/extended crank time. replaced fuel pump due to low fuel pressure. one week later car came back with customer complaining of popping noise sometimes when starting and intermittently car would die. ...
2005 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL63865
HELP! AFTER NEW COMPUTER: Client drove for 70miles when Code P0012 - Camshaft Position "A" Timing Over-Retarded BANK 1 We began by clearing codes & double checking part # options, checking for TSBs, RECALLs, Iatn, Circuit testing, consulting w/ACDelco part... Trouble codes: P0012 (Camshaft Position A Timing Over-Retarded Bank 1)
2001 Saturn SL1 1.9L No Start VIN: 1G8ZH52881
Car was towed in as a crank no start. Found no fuel pump operation, no spark @ plugs and no scan tool data. koeo at 5 volt reference wire read 3.42 volts (tps, map and egr). I think the pcm seems warm to the touch? The fuel pump runs if we jumper the relay and...
2005 Saturn Vue 2.2L Cuts out VIN: 5GZCZ23D85
this car will run for 1 - 2 minutes , the fuel pressure gauge shows 55-60lbs as it runs it drops off to 10 lbs when vehicle shuts down immediatly fuel pressure returns to 55 - 60 lbs ...dealer advised there were 2 fuel pumps and to replace both we have to not ...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Century Custom 3.1L ac blen door VIN: 25DFG25HJ2
thanks to all you guys that help me with this headek i fix the promble by evack and recharge the com plet system thanks mo
2004 Buick Rendezvous CX 3.4L No Start VIN: 3G5DA03E84
The fix was at first I was thinking that the pass system was going nuts, so I looked at the fuel disable on the scanner and it was saying Yes which means to me the pass key Wasn't the problem. So back tho the 24x reading that I was getting, no movement. So I w... Trouble codes: P0336.
1987 Cadillac Allante 4.1L No Start, Stall VIN: 1G6VR3179H
The problem ended up being a faulty ecm. I guess I shouldn't have assumed it was okay just because it was new. I'm not sure if it was defective from the start or bad grounds took it out before I got a chance to clean them up. I received 10 replies to this po...
1989 Chevrolet S10 Blazer Sport 4.3L gage no disply VIN: 1GNCT18Z3K
As tested, the Replacement cluster was faulty. the replacement from model electronics fixed it! thanx to all who replied. B+ @ pins B14, A3, Gnd @ AP, B11. gnd term near ebrake #302.
2003 Chevrolet Trailblazer North Face 4.2L throttle body VIN: 1GNDT13S73
Thanks to all who replied. It was the throttle body unit. We replaced it with new and problem solved. Afterward we took the old one apart and found stripped out plastic gears. Thanks Again!
1996 GMC Savana 2500 5.7L IGN A fuse VIN: 1GTFG25R1T
Well, we re-checked all wiring and performed voltage drop checks on positive and negative battery cables and found nothing wrong. We decided to go ahead and replace the ignition switch assy. which solved the problem. I pulled the old one apart and found it was...
2006 GMC Sierra 2500 HD SLT 6.6L Hesitation, Cuts out, lack power VIN: 1GTHK23D76
installed new cp3 pump on thursday customer took truck on friday unit ran fine for 3 days unit came back same issues lets out a cloud of black smoke and cel light comes on with the same freeze frame data as before and low fuel ps... Trouble codes: P0087.
1998 Oldsmobile Intrigue 3.8L Poor Idle Quality, Surge, Stall, Excess crankcase vac VIN: 1G3WH52K4W
A big thankyou to the guys that suggested we look at the o-ring on the PCV valve. As it turned out the customer decided to leave it here for the weekend after all, a good thing. It took me about 30 seconds to pull off the engine cover, unplug the MAP sensor an...
1967 Pontiac GTO 400CID Key tumbler VIN: 242677B137
Hi ya Guys, Well, after working with the switch myself and allowing the customer and others who thought they could get it to turn to the "Accessary" side of the switch, the customer said "Drill the darn thing" I did just that and had it out within ten ...
1994 Pontiac Grand Prix SE 3.4L power antenna VIN: 1G2WJ12X3R
Well, vehicle sold before resolving the issue. Brian recommended contacting the local dealer to obtain a schematic. I never got around to chasing one down but will pursue that option with future electrical challenges when alldata and other sources don't matc...
1995 Pontiac Firebird Trans Am 5.7L No Start VIN: P1S2246651
tried another dist,same problem found the coil module was no good, thanx to everyone for the info
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