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Prev Professional Automotive Repair Technical Discussions for May 18, 2006
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Open Help Requests for GM
Help Request Answers
1988 Chevrolet Astro 4.3L Surge, Stall VIN: 1GBDM15Z3J
I have this headache here. At idle when its put into gear it has a severe surge. I've check about everything there is to check. Whats happening that I can see is the dist. ref. signal and the signal coming from the ecm back to the dist. are both going away, at...
1990 Chevrolet R1500 Suburban Silverado 5.7L fuel guage VIN: 1GNER16K2L
Hello thanks for helping me in advance.This vehicle had a working fuel guage was near empty and customer filled it up only went to 1/2 way on guage. when i disconnect the connector at the sender with the key on the guage goes to past full whith the connector d...
1992 Chevrolet S10 Blazer 4.3L Poor Idle Quality, Stall
Have this 92 4.3L Chevy S-10 Blazer and I'm on my third reman ECM. Truck is a 1992 and it has the 2 TBI injectors on top of the manifold. It came in about 5 months ago with the RIGHT side fuel injector not working. Replaced the ECM and it ran for 5 months. It ...
1993 Chevrolet S10 Blazer Tahoe 4.3L Misfire VIN: 1GNCT18W6P
this is misfiring on cyl. 1,3,5. when it was dropped off it was running very rough, black soot out the tailpipe. we took the pleunm off to check if regulator was leaking and it was so we replaced the cpi unit thinking that was the main problem but it just didn...
1995 Chevrolet Astro CL 4.3L intake valve VIN: 1GNEL19WXS
I have a 1995 Chev. Astro AWD 4.3L. We installed 2 refurbished/rebuilt heads and new gaskets, came back 2500 miles later with a burnt intake valve cylinder 5. We dont see any other problems with block or intake. The machine shop we got the heads from just said...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W7V
Hello all, My personal car. Had a no start out of the blue one morning(was running fine). I primed it and it ran for a minute & died. Cranked it a little longer than normal and it fired and ran fine then I shut it down. Left it for the day and came home & trie...
1998 Chevrolet Camaro Z28 5.7L Hesitation, Cuts out, MIL Lamp on VIN: 2G1FP22G2W
Okay, this one should be an easy one, but I just dont see it. Car comes in with a SES light and a hesitation complaint, easy right? Well anyway, when the car is cold it is the worst, but it always has a problem. And that is when you give it any amount of throt... Trouble codes: P0131 (O2 1-1 circuit low voltage), P0137 (O2 2-1 circuit low voltage), P0151 (O2 1-2 circuit low voltage), P0157 (O2 2-2 circuit low voltage), P0404 (Egr performance pintle was stuck so a new one was installed)
1999 Chevrolet Venture 3.4L Subframe VIN: 1GNDX03E6X
Hi all. Replaced R/F hub/bearing assy. to cure obvious bearing noise. Customer returned two days latr complaining of a clunking noise in front. He says no noise before. Noise is loud and is heard only when driving and shifting vehicle weight from one side to t...
2002 Chevrolet Trailblazer LS 4.2L wiper arms VIN: 1GNDT13S12
Greetings, GM techs! Have an odd one here- this TrailBlazer has the Rainsense wiper system on front and all works normally EXCEPT the wipers jerk excessively on the downstroke on delay only. It is not just a stick- slip situation- They actually are stopping fo...
2003 Chevrolet Trailblazer LT 4.2L lack of power VIN: 1GNES16S13
hi, the problem i am having is lack of power. when sitting at idle in park and accelerate the engine will not rev over 2000 rpm's. i pulled the converter assembley off to check for restriction, but looked fine, and also started engine with exhaust disconnected...
1994 GMC C7000 Topkick C7H042 6.0L speedo VIN: 1GDJ7H1P6R
any one have any idea on how to check cluster or anyone know any specs on the wiring or have any wiring diagrams on this vehicle
1995 GMC Yukon 5.7L Stall VIN: 1GKEK18K1S
Interesting one here. The truck lacks power badly on accel until you hit about 2400 rpm and then it runs like a top. It stalls quite frequently at stoplights and under hard accel from a stop. It sputters and dies. No codes, fuel pressure is normal, and spark d...
2003 GMC Sierra 3500 6.0L Misfire VIN: 1GDJC34V23
Hi group. We are having a real difficult time to fix a code P0300.GMC 3500 truck. MISFIRE IS ONLY DURING IDLE. On scanner shows misfire on #7 and #8 cylinder. As soon as I raise the RPM TO 1300. MISFIRE DISAPPEARS and engine runs smooth. other repair shop repl... Trouble codes: P0300 (testing and results)
1995 Oldsmobile 88 Royale 3.8L Poor Idle Quality VIN: 1G3HN52K7S
Hi again guys. We have here a 95 Olds 88 that came in for a 3.8L engine swap. After installing a 3.8L from a 98 monte carlo, the engine now has an annoying vibration. The supplier swears the engine ran perfect with no hint of a vibration. No codes were found ...
1997 Oldsmobile Aurora 4.0L drivers power window VIN: 1G3GR62C5V
This car came in with the drivers power window inop I checked to make sure it was getting power from the switch it was so I replaced the motor. It went about 2 months and had no problems then it came back with window inop I checked it again and same thing so I...
1998 Oldsmobile Regency 3.8L Stall, MIL Lamp on VIN: 1GC52K6W48
Customer sayes that vehicle stalls at times. Mostly on decel, or at low speeds. I have test driven this car many times with no problems. Tested fuel pump, it has a good lab scope pattern, and 51 PSI. Scanned for codes, has three codes stored P0327, P0332, and ... Trouble codes: P0327 (Knock sensor bank 1), P0332 (Knock sensor bank 2), P0336 (Crankshaft position sensor performance)
2001 Pontiac Montana 3.4L Cooling Systems VIN: 1GMDX03E01
i'm trying to diagnose my parent's montana, and i want to run something by you experts before i spend alot of their money. the problem is that the cooling fans never come on automatically or with the a/c on. i can turn them on with a scanner, which means that ...
2001 Pontiac Grand Am SE 2.4L trac light VIN: 1G2NF52T21
This car has trac off light on and a C1275 code pcm requested ets to be disabled. I have not encountered this before and was needing some insight on where to begin on this problem the car seems to still drive ok brakes work properly and trans shifts good. Any ...
2000 Saturn SL1 1.9L sdm VIN: 1G8ZH5288Y
hello techs, i received this 2000 saturn sl1 from body shop and they replaced air bags and sdm(AIR BAG CONTROL UNIT). i have a tech 2 and code b1001 is not clearing.i need to program the bcm to see the sdm.i need to know if anyone has done this with the tech 2...
2002 Saturn L200 2.2L Temperature Gauge VIN: 1G8JU54F52
Temperature gauge flucuates and vibrates between 1/4 to hot all the time. Key on, engine off or engine run. Voltage drop test grounds at PCM and instrument cluster. 0.03 volts. No codes in system. Coolant sensor reads normal for PCM. Replaced wiring connector ...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Electra Park Avenue 3.8L Accessories VIN: 1G4CW54C3K
First of all thanks again to all who responded.Received many useful suggestions!I should have stated in my posting that I did change the battery etc.I also was puzzled by a mere 35 MA killing the battery,especially in such a short time.Mike [...] and Ben Si...
1996 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y2T
thanks to all that sent help. now what fix the car i relearnd the password for theft system by turn key on do not crank for 10min.turn off wait 5sec. do this 3 times. after third time car started.hope this will help any one else.
1992 Chevrolet Blazer Cheyenne 5.7L No Start, Stall VIN: 1GNEK18KXN
well the modula in the reman dist i got was bad . so i replaced it with ac delco and its done and delivered !!! thanks every one for your help , keep up the good work !!
1996 Chevrolet C1500 Cheyenne 5.0L MIL Lamp on VIN: 1GCEC19MXT
Short answer; The EGR valve was installed backwards during the intake manifold reseal. I have never seen an EGR where the pintle is on the intake side before, but some GM engineer came up with the idea that you could use intake vacuum and exhaust backpressure ... Trouble codes: P1406.
1998 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEK19R4W
I fixed this by closely following the distributor installation procedure in alldata. I had never encountered this before and didn't realize you had to have the dist within 2 degrees according to the scan tool. Thanks for the help
2003 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC12F93
This car starts and runs now. The wires at the crank sensor were spliced together incorrectly. On my update I misstated the years of the cars. The car actually is 2002, the engine 2003. (they told me right and I knew it right, but wrote it wrong) Sorry for the...
1999 GMC C6500 7.4L hard start VIN: 1GDJ7H1D7X
Sorry for the delay the truck just came back in. I rechecked fuel pressure and it was 60 I was working on a few different problem vehicles that day and wrote down the wrong readings on this vehicle. I found two problems 1st the vacum line to the fuel pressure ...
1996 Oldsmobile Aurora 4.0L Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G3GR62C45
I'd like to thank everyone who offered help. Customer opted to take it to the dealer.. said they replaced the ignition module and everything is good. That was the next piece i was going to try but cust wanted the car back before i could give it a try. Thanks... Trouble codes: 1377 (4x ic cam reference signal).
1999 Pontiac Grand Prix GTP 3.8L Radio display VIN: 1G2WR5212X
Thanks most of you new right away how to fix and what and where to get part. Some even supplied the gm part #. Chris
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