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Prev Professional Automotive Repair Technical Discussions for April 9, 2007
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Open Help Requests for GM
Help Request Answers
1998 Cadillac Eldorado ESC 4.6L MIL Lamp on VIN: 1G6EL12Y7W
I have this caddy and tring to get a mass state inspection on it I have done a fair amount of work and cleaded all the previous codes and then sent the customet on his way to get all the readiness codes reset.He has now returned 3 week later and has 1 code P07...
1998 Cadillac DeVille 4.6L Poor Idle Quality, MIL Lamp on VIN: KD6KD54Y8W
Welcome any response and help. I have a Deville that at random increases idle slowly and up to 1500rpm - 2000rpm. Turn eng. off and restart,idles normal at first, then increases again slowly. Customer previously replaced -IAC,TPS,EGR. Cannot find any vacum lea...
1988 Chevrolet K1500 Cheyenne 5.7L Coolant reservoir VIN: 1GCDK14KXJ
Happy Easter everyone. The customer brought this vehicle to me overheating. He said there was oil in the coolant reservoir and another shop recommeded that he flush and replace the thermostat. He didn't go to far and it is still overheating. Coolant was low wh...
1995 Chevrolet K3500 6.5L no power VIN: 1GBHK33F7S
This truck came to me with an intermittent no-start...also had no power. I diagnosed a failed injector pump and replaced it. Now it starts easily every time, but still has no power, takes forever to reach hi-way speed. Snap-on scanner shows data...coolant temp...
1998 Chevrolet K1500 Cheyenne 5.0L Unknown VIN: 1GCEK19MXW
Please help. Replaced with GM longblock. re-used intake and dist. If truck sits for a couple of hours at start up we hear a whine/howl noise that lasts only about 2 mins. Noise seems to be comming from around ft of oil pan and exhaust manifold area. checked pc...
1999 Chevrolet C1500 Suburban 5.7L speedometer VIN: 1GNEC16R7X
The speedo reads 52 when going 60. We checked rear end ratio 373. found it is the stock ratio. We checked to make sure that the correct tire size was in the ECM which it was. So we finally reflashed the ECM and it still didn't fix the problem. Any ideas would ...
2000 Chevrolet Silverado 2500 5.3L transfercase VIN: 1GCEK29U5Y
this truck will sometimes not shift in 4wd its an automatic system with a code co387 The problem is that its intermittant the lights on the shift switch just flash and the transfercase reverts back to 2wd any ideas ? When this truck is in the shop it works fin...
2003 Chevrolet Malibu LS 3.1L Fuel gauge, electric windows, doorlocks, interior VIN: 1G1NE52JX3
Hi Group, Got thid one, it has an intermittent problem, it will loose door locks, electric windows, fuel gauge, interior lights operation for a while but not enough for testing. According to Mitchell there is a common ground for all this and it seems to be goo...
2004 Chevrolet Silverado 1500 4.8L Hesitation VIN: 2GCEC19V44
well i hope some one can point me it the right direction on this truck that was brought to me over the weekend.we found the codes listed below,and the complain was truck would not speed up more that 20 mph,we reset the ecu and the problem goes away we also che... Trouble codes: P1516 (electronic throttle mod vs throttle position), P2135 (tp sensor 1-2 correlation)
1995 GMC Jimmy SL 4.3L Pedal feel VIN: 1GKCT18WXS
Ok this is my wifes rig and she is saying that the brakes are hard lessend assist. I drove it and sure enough when you hit the brakes like in a panic stop the pedal is firm then returns to normal but it just seems like the booster isn't able to boost fast enou...
1991 Pontiac Grand Prix SE 3.4L security system VIN: 1G2WP52K42
Group, Customer came in to get ignition lock cylinder replaced because of sticking & couldnt remove key found cylinder worn out replaced with coded oem cylinder & security light blinking & car would start & die after 3 sec, checked for 5volt to pass key module...
1995 Pontiac Bonneville SE 3.8L Misfire VIN: 1G2HX542K5
well need help on this one will say thanks in advance well the car came in with missfire found that #5 has miss., has new intake and gaskets and head work where done 1 mouth ago new wire and plugs check compression 175psi checke fule 45to50 at running koeo 47 ...
2000 Pontiac Grand Prix GT 3.8L abs ligt trac off light on VIN: 1G2WP12K7Y
grand prix was left running when car was given to me to fix.hooked up mastertech to retrieve [...] and 0056 .scanner defines code as malfunctions with lr speed sensor.took for drive all sensor info seems normal?looked up code on mitchell .code only for f ...
1999 Saturn SL2 1.9L horn VIN: 1G8ZK5270X
Has 2 high beam bulbs bad, and lady said horn will start blowing and dome lights flashing on its own at night, ran function test with transmitter. Can this system be disabled?Just tried the function test again and notice the horn don't chirp, the dome light wo...
2003 Saturn L200 2.2L cooling fans VIN: 1G8JU54F13
hello freinds, have cooling fans running at high speed. both fans. with key on fans running at full speed. pcm controls fans. coolant temperature in pcm is below 180f. this system uses pcm to control fan function. fan module has 4 relays built into it. are fan... Trouble codes: N0NE

Fixes & Summaries for GM
Fix/Summary Answers
1990 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GCDC14Z51
thanks for all of the great repies. put in a reman dist & truck runs great. i would still like to know why when i would unplug by pass connector truck would run fine , but in computed timming it would back fire & run bad. but thanks again for the help.
1993 Chevrolet K3500 Cheyenne 5.7L Front axle VIN: 1GCHK34K9P
Thank you to everyone that replied -- it always ends up being the simplest things that cause the biggest headaches. I'm pretty ashamed that I missed this, but the cage in the outer CV joint on the passenger side axle was blown to pieces. Since there was no res...
1994 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on, Runs Real Lean VIN: 1GCCS14Z5R
First thanks to all that replied, I first replaced the injectors due to too much resistance and the spray pattern was irratic. I then replaced the cat due to it was comming apart caused by all the missing and irratic running and I did not want to take any chan...
1995 Chevrolet Caprice Classic 5.7L Poor Idle Quality, Cuts out, Misfire
well thanks to ALL that replied I learned a few things on this the guy decided to let his son take it to a shop near his school (out of town college) and he was out on spring break so i really thank all that replied since my posting was so vague but, i will po...
1998 Chevrolet Monte Carlo Z34 3.8L abs VIN: 1GR4YHERIU
Yes, Thanks guys and the tech at our sister shop thanks you. It was a cracked reluctor ring on the LF axle shaft. Thanks so much and God bless Eric
1998 Chevrolet Blazer 4.3L heater VIN: 1GNDT17W5W
i did not repair the vehicle because the customer was to return for further diagnostics. he has indicated he will come back when he can aford it. i want to thank everyone who resonded. i will let you know what repair was required as quickly as possible
2000 Chevrolet Silverado 1500 5.3L Radio Um6
Thanks for the help I had a shorted to ground drivers door speaker,ohm test each speaker at main harness.
2003 GMC 4300 7.5L Lighting VIN: IHTMMAAM03
Thanks to the following techs:From the HD/Fleet Forum; Thomas Marty, Bruce Amacker, Rusty Savignac and Damon Russell. From the Tech Mail Help Request; John [...] and Michael from California. We learned a lot. Th...
2002 Pontiac Grand Am SE 2.2L oil life monitor VIN: 1G2NE52F02
Hello and thanks to all who offered help to my request it was greatly appreciated by myself and the customer.I tried all suggestions pertaining to the style and instructions I had for this vehicle(reset buttion in fuse panel)and believe it or not the suggestio...
2002 Pontiac Grand Am GT 3.4L Hesitation, Misfire VIN: 1G2NV52E22
Well, the vast majority of the replies were correct with a plugged cat. Finally pulled the O2 sensor and the car ran great. Hard to believe with decent vacuum readings but this one is gone thanks to everyone who replied. mg
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