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Prev Professional Automotive Repair Technical Discussions for April 18, 2005
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Open Help Requests for GM
Help Request Answers
1972 Chevrolet CORVETTE 350CID power steering
this car came in with poor power assist, this is most noticeable during parking/slow speed situations.the above parts had all been replaced by outher shops, one shop back home (in hawaii) installed all new hydraulics ( due to leakage) and the problem started t...
1995 Chevrolet Blazer 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W6S
Vehical came in with Po 341, engine severly missfiring. Previous shop broke disributor ear installing dist cap. I installed new dist housing as per Alldata and Shop Key. I am absolutly possitive distributor is indexed corecly " rotor pointing toward the tiny n... Trouble codes: P0341
1997 Chevrolet Venture 3.4L front suspension VIN: 1GNDX06EXV
please help us ut here, we cant make this thing make the noise on the rack, but it is there, we cant see anything loose, we have soaked every bolt with pb blaster and we have put a wrench on every bolt on this vehicle and everything is tight. please help we ar...
1997 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1240V
Hello All, Got a real stumper for me this time. I'm hoping I'm just missing something easy. This vehicle came to us with no history as a repo and a no start. Upon some inspection, I found that someone had managed to jam a 3-wire engine harness connector into a...
1998 Chevrolet Prizm 1.8L Hesitation, Cuts out, Misfire VIN: 1Y1SK5282W
Engine will vary from multiple light misfires to two second loss of power. Will do it at no load high rpm to all conditions driving. It is intermittent, but will act up to some degree within a 10 blocks of driving.Any known problems with these vehicles. Is it ...
1998 Chevrolet Express 3500 5.7L Stall, MIL Lamp on, Severe spark knock VIN: 1GBHG31R0W
This Van was toed in a few months ago, the engine was blown, we replace with a NEW engine. After we had a sever spark knock , and a stall. We got the codes out and got P1345 , so we did diagnostic, and found the desired timing was out of spec, we replaced the ... Trouble codes: P1345 (Crank/Cam Correlation Problemb)
2002 Chevrolet Cavalier 2.2L coolant fan VIN: 1G1JC12462
car came in with an overheating compaint when at idle and going up hills.i ran the car and noticed the fans were staying on and the lower hose was ice cold, replaced the thermostat and same thing, so i put the scanner on it and the coolant was only at 190 and ...
2003 Chevrolet Impala 3.4L overheats VIN: 2G1WF52E03
Vehicle came in with "Service Vehicle Soon" light on (not SES light). Engine is overheating and cooling fans will not come on. Checked all relays, wireing, fans etc. can force the fans on with snap-on scanner (except when engine is too hot, then scanner displa...
1997 GMC Savana 3500 5.7L Shoes 13 x 3.5 VIN: 1GTHG35R6V
Hi there my fellow wizards, I have this GMC van in my shop for a routine four wheel brake job. The rear brakes are the culprit in that they keep hanging up. We replaced the shoes(aftermarket), hardware(aftermarket) and machined the drums. Of course we lubed th...
1999 GMC Jimmy SL 4.3L flasher VIN: 1GKDT13W4X
My flasher keeps going even though my signal light is in the neutral position.. when I press the brake it stops sometimes.. also when I play with the multi function switch I can get it to stop..
2002 GMC Savana 3500 5.7L high idle VIN: 1GTHG35R92
seems to idle at about 2000 rpm all the time, hot or cold, only has a iac code, has new g.m. iac. did not make any difference. no other problems other than high idle
1969 Pontiac Gran Prix 428CID ignition VIN: 276579P159
Having trouble figuring this one out. Noticed the shop that last worked on this one set up distributor based on right front cylinder as #1. Then it just got weird after that. So, I redid it with the standard chevy way, left front cylinder as #1 and normal chev...
2001 Pontiac Sunfire GT 2.4L MIL Lamp on VIN: 3G2JD12T01
Hello all, this one should be fairly straight forward but I am currently up in the air. The car came in 1 week ago, scan test revealed the P1441a code, suspected ghost, cleared and roadtested, appeared to actuate purge valve properly, could not run drive cycle... Trouble codes: P1441

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L Surge, Stall VIN: 1G4HP52L2R
The majority of replies said PCM .With all the comments about the PCM , I could have sold it as preventive maintenance . Others had mentioned the engine wiring harness,which I had pulled. And also the common problem on grounds around the ignition module.One of... Trouble codes: 341 (cam sensor circuit).
1989 Cadillac Allante 4.5L Battery VIN: 1G6VR3187K
Thank you for all the replies. One thing I have found to be true is that most cars have the same pattern failures and the place to find them is this network. [...] hit it right on the head. There is a factory arm and disarm switch in each door. You can chec...
1992 Chevrolet K1500 Cheyenne 5.0L Poor Idle Quality, Surge, Stall VIN: 1GCEK14H5N
thanks for all of your suggestion. i list this as fixed , but it is only (considerably better) as the customer puts it. i did check for vacuum leaks. all was ok. tried a new computer, didn't change anything . completely closed off egr. swapped a good tbi unit ...
1996 Chevrolet Blazer 4.3L Misfire, MIL Lamp on
thanks for all the replies after scoping the motor, and finding perfect primary ignition, a very odd clyinder balance and secondary ignition patterns we looked into fuel. all the misfires were mostly cyliners 2,4 and 6. we hooked up the fuel pressure guage and... Trouble codes: P00, 300 (random misfire).
1998 Chevrolet Astro 4.3L engine VIN: 1GNDM19W2W
Thanks to all who replied. It turns out that the cam to crank sensor relationship is in spec so we left the dist. alone. I was finally able to get the start and die problem to repeat by moving the tilt column. We replaced th VATS sensor and igntion switch. The...
1998 Chevrolet Venture 3.4L RR wheel cylnder VIN: 1GNDXO6E9W
Thanks to all who replied escpecially Kent [...] who hit the nail on the head. I removed the line and it looked like a crack at the bottom of the flare after I put the line under a lighted magnifier could I see the split . The split would open up under...
1999 Chevrolet KODIAC 7.2L park brake alarm module VIN: C7XJ105931
well guys it's like this,it is fixed!!we started all over.when the dtc's are displayed there is other info displayed as well.after dtc 01,you also get a voltage reading recorded at the time the code was recorded.dtc 02 also gives voltage and a pressure reading...
1997 GMC K2500 Sierra SL 6.5L miss fire VIN: 1GCGK29F0V
as it turns out this junk yard engine has some issues.some one had #5 & 6 injecter lines reversed on the pump. There were some injecter problems also. now with it running somewhat properly there are some other noises from the engine that we dont think should b...
1996 Pontiac Bonneville SE 3.8L blend door VIN: 1G2HX52K2T
I had three replies. Two of them said that the blend door motor was bad, and one sugested that something was stuck in the door itself causing the door to not move all of the way. I do not think this is the case since the boss said he could see the door go all ...
1997 Pontiac Sunfire SE 2.4L oiling system VIN: 1G2JD12TTO
We checked valve stem hieght and valve spring pressure, they were all within specification. But we did find that on a rebuilt cylinder head it was missing the valve rotators that are used only on the 'intake valves'. Evidently, according to rebuilder spec.s th...
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