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Prev Professional Automotive Repair Technical Discussions for May 12, 2010
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Open Help Requests for GM
Help Request Answers
1986 Chevrolet Camaro Z28 Iroc-Z 5.0L MIL Lamp on VIN: 1G1FP87F2G
i have tried a reman comp from GM and i tested the wireing to the maf. and i have my 12volt sorce and my 5 volt ref. the maf gm/sec reads 8 and the air flow gm/sec reads 6 i cant seem to figure out what is going on im lost. Trouble codes: 34 (mass air flow sen. low)
1990 Chevrolet K1500 Silverado 5.0L Excessive Emissions, No Start, Poor Idle Quality VIN: 1GTDK14K3L
Hi techs. Guy brought this truck to us from another shop. His complaint was that he parked the truck for two weeks and when he started it it ran very rough. Took it to the other shop and they replaced the plugs, wires, dist. Cap, rotor and air filter. Truck wa...
1990 Chevrolet Camaro Iroc-Z 5.0L Hesitation, Surge, Cuts out, Stall VIN: 1G1FP33F4L
Hello all, thanks in advance for the help. This Camaro was towed into our shop for a no start. Vehicle started right up. As soon as you put it in drive it dies, runs fine in reverse. If you let it reach opperating temperature it will idle fine in drive but as ...
1997 Chevrolet K1500 5.7L No Start VIN: 2GCEK19RXV
diferent cap, rotor , distributor same results. I tryied to adjust valves according with book and with motor runnig no diference. Thank you
1997 Chevrolet K1500 Silverado 5.7L Hesitation, Cuts out, MIL Lamp on VIN: 2GCEK19R1T
this truck came to my shop because when you give it gas it does not rev up it stumbles and cuts out and sometimes dies the cam retard was at 20 degrees when it came in customer told me he replaced the engine and removed the distributor i removed the distributo... Trouble codes: P0171, P0174, P0151, P0131
2000 Chevrolet S10 4.3L 1-2 Shift VIN: 1GCDT19W6Y
This truck is exhibiting a no shift/slip when shifting from 1 to 2. Also, the truck has no fourth gear. The transmission will shift when the throttle is lifted; but it is a very poor and loose shift. After the shift is complete the gear holds with no slip. The...
2000 Chevrolet C3500 7.4L Long crank time VIN: 1GBJK34J9Y
Vehicle was originally brought to me with a rough idle/stalling condition and hard starting. Had been at the dealership where tps, map sensor and vapour cannister had been replaced. Fuelinjectors and fuel rail were also replaced. I found large vacuum leaks und...
2002 Chevrolet Avalanche 1500 Z71 5.3L Mechanical VIN: 3GNEK13T82
Customer complains of low brake pedal. That was the original complant 25000 miles ago.Took to gm they told him that was normal for that type vechile. Today customer brouht back vechile for noise while driving.I test drove to listen to the noise and the brake p...
2004 Chevrolet Silverado 2500 6.0L No Start, Stall, MIL Lamp on VIN: 1GCHK24U14
Vehicle died on road. Customer pulled in to us. It started for me and i drove it in shop. Vehicle then died. I have good fuel pressure. Found these codes. Scoped crank sensor and found it starts acting weird and then goes flat, vehicle dies. It will not start ... Trouble codes: P0332 (Knock sensor 2 signal short/low), P0335 (Crank sensor a circuit problem), P0336 (Crank sensor a 18/24x out of range), P0455 (Evap large leak)
2007 Chevrolet Malibu LS 2.2L Starter VIN: 1G1ZS58F67
car stopped running while driving and was towed to shop. no crank & no start. had code P1516. can make starter crank at starter or at relay but will not start. checked wiring at ignition switch, all around pcm and checked grounds for pcm. has message on radio ...
2009 Chevrolet Malibu LT 2.4L vibration VIN: 1G1ZH57B69
Under a hard acceleration from a stop or moving slow there is a shake or viration felt mostly in the floor, a little more pronounced if in a curve or slight turn. Drives and rides fine other wise. Reminds me of the old Plymouth tourismos if the engine was shif...
1998 GMC School Bus Chassis B7T042 6.5L No Start, Stall VIN: 1GBHG31F9W
Bus was going down the road and quit. Towed in and saw the injector driver module melted in one spot. Put in new one and relocated with a heat sink. Still no start. It is driving the injector solenoid on and off at about 10 amps. Lift pump tests out ok. What a...
1999 GMC Jimmy SL 4.3L temp door VIN: 1GKDT13W6X
can anyone please help? thanks, sonny
2002 GMC Sierra 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1G23687916
Vehicle only missed at highway speeds under a load. Misses between 65 and 75 MPH. Cylinder 1 and 6 are the only cylinders missing. Runs great without misses at lower and higher speeds. Trouble codes: P0300 (Random Cylinder Misfire)
2007 GMC Acadia SLT 3.6L Accessories VIN: 1GKEV33797
I am working on a 2007 GMC Acadia that is used by a local radio station for a "Freeway Hero". When I received the vehicle, it had over an inch of standing water in it. I extended the sunroof drains and repaired 16 other leaks (light bar and other accessories),...
2000 Other GM zanzibar 300CID Poor Idle Quality, Surge, MIL Lamp on, smoke
This is for any diesel guys out there. This is a safari RV with a catapillar engine that belongs to a friend of mine. He states that when started it runs bad and belches black smoke. I went out and looked it over this morning and it ran fine. After about 30 se...
2003 Pontiac Vibe 1.8L rear noise VIN: 5Y2SL62833
Hello techs. I have a 2003 Pontiac Vibe here that came in for a brake noise from the right rear. We test drove the vehicle and there is definitely a noise that sounds like the strut. I can duplicate the noise in the shop, when rocking the car, the only problem...
2000 Saturn LS2 3.0L Fuel pressure VIN: 1013073673
Car came with a no start,no fuel pressure dropped tank fuel pump and gas tank were full of rust, replaced fuel pump and clean out gas tank,still no pressure had tech check all wiring and pump was not getting voltage pulled fuel pump relay and all signals there...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Cadillac Catera 3.0L Accessories VIN: W06VR52R0W
Faulty connector on the back of the circuit board. The 20 or so wire plug that plugs in on the drivers side into the back of the cluster board was not fitting into the plug properly. Simple fix.
2003 Cadillac CTS 3.2L Mechanical VIN: 5678909876
Thankyou gentlemen for the input. I have currenty passed on the repair job, the thought of having to buy a lot of tools for a repair that i am not yet seeing as a 'REGULAR' repair has turned me off. I may have been ok without them, but it was too risky to div...
2004 Cadillac SRX 3.6L steering VIN: 1GYDE63784
First pump was defective, replaced with different pump all is good.
1987 Chevrolet S10 2.8L Excessive Emissions VIN: 1GCCS14R3H
Yes . the only way was to remove the intake and use a long cable that bends . On a bench , I was able clean from the right angle. Thank you guys.
1996 Chevrolet C2500 Suburban 7.4L Hesitation, Surge, Misfire VIN: 1GNGK26J9T
2001 Chevrolet Malibu 3.1L No Start, Anti-Theft System VIN: 1G1WE52J61
Thanks for the great number of responses for my request. With the number of you that replied, I feel like I should have known the repair myself. Anyway, the owner decided the repair was too costly and is still dealing with not starting at any possible moment...
2001 Chevrolet Impala 3.4L No Start VIN: 5678909876
Gentlemen, Gentlemen, If i was a lying man i'd be able to tell you all a lie, but i'm not so i am going to give it to you 'as is'. It turned out that my noid hook-up was somewhat weak and i was getting injector pulse after going over it better and seeking a g...
2004 Chevrolet Trailblazer LS 4.2L timing VIN: 1GNDT13S65
hey guys thanks for the replies...my boss decided that a used motor would do the trick and it did...i still dont know what we were missing on the marks???My internet has been down for days and i wasnt able to take advantage of this awesome site...Thanks again ...
1997 Oldsmobile Aurora 4.0L Compressor VIN: 1G3GR62C8V
Douglas, thank you. The Aurora is fixed due to a faulty High Side Temp Sensor. Would read ambient temp just fine and cut out at 20 degrees but numbers were way out from what we recorded on the manifold gauges. Thanks
2005 Pontiac Montana SV6 3.5L Cuts out, Misfire VIN: 1GMDV23165
Sorry for the delay, the owner has cancelled appts 3 times in the last week or so, and I kept holding off hoping I would finally get the van in and get some results, but that has'nt happened yet. Mike first offered an aftermarket alarm as a cause, but this va...
2004 Saturn Vue 3.5L drivetrain VIN: 5GZCZ63404
The fix is in-James from Wyoming got us in the right direction-we kept thinking that the weight of the vehicle had to do with the noise but it had to do with the rear half shaft angle-there is a plastic dust protector on the differential side of the half shaf...
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