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Prev Professional Automotive Repair Technical Discussions for December 26, 2006
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L Hesitation, Surge, Stall, Misfire VIN: 1G4HP52K1V
vehicle surges at cruise most of the time at around 35 mph and sometimes gets better under acceleration scantool readings seem normal except for TCC keeps dropping to 50to 60% from 100% when this occurs I only get to work on this car during the weekend and wit...
1989 Cadillac Seville 4.5L heater blower motor VIN: 1G6KS5156K
This cadilac had a blower motor that would not shut off with switch or key.So I went to the IATN knowledge base and I found so many of these cars with the exact same problem so I replaced the power module and blower motor with new A/C Delco parts. Now I have n...
1987 Chevrolet V30 Custom Deluxe 7.4L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GCHV33N6H
1990 Chevrolet G20 Sportvan 5.7L No Start VIN: 1GBEG25K2L
This is one of our used vans. The owner was driving it and it hiccuped, then lost power. It would only accelerate at part throttle, then it would only idle. He thot it was out of gas, so he stopped at a gas station and put in a half tank and then it would not ...
1994 Chevrolet S10 Blazer Tahoe 4.3L Cuts out VIN: 1GNDT13W1R
Blazer starts normally, runs good but after 15 or more miles when it is shut down. it might not start until it cools down, happens to the customer, but it never happend to me, but the customer is dependable with his account of how this happens. replaced fuel p...
1995 Chevrolet Camaro 3.4L Right three cylinders not running VIN: 2G1FP22S1S
Got one for the Chevy guys out there. Did head gaskets on this 3.4L. Right bank is dead, loads up with gas, thought at first the injectors were leaking, I dont think thats the case. I'm affraid the valves are adjusted incorrectly ( although I did it to specs )...
1996 Chevrolet Camaro 3.8L theft system VIN: 2G1FP22K4T
Thanks in advance for any help. This 96 camaro has the PASS KEY and the UTD theft system. The car first came in with the alarm activated, lights flashing, horn blowing & no start. The alarm could not be deactivated no matter what was done. I checked all wiring...
1998 Chevrolet C6500 7.2L No Start VIN: 1GBJH1C1WJ
good day all, this 3126 cat died while driving.was not able to get to much info from driver but it appears to have just been filled with fuel. check fuel with hydrometer and poured some in a styrofoam cup and its still sitting there , so i don't suspect gas in...
1998 Chevrolet C3500 Cheyenne 5.7L heat controls/defrost controls VIN: 1GCGC33J9W
customer had heat core at other shop now when put in defrost heat drops just blowing cool, when in heat mode works fine. what i need to no is will i have to remove box to check controls and or if anybody came across this, i dont want to over charge for diag. t...
2000 Chevrolet Venture LS 3.4L Hesitation, Cuts out, Stall VIN: 1GNDX03E4X
This van is about got me down. It will start cold and run fine. The time it takes to fail varies widely but it does seem to be worse hot. It will cut out almost like a complete ignition shut off very briefly and then back on I even get a battery light to flash...
2002 Chevrolet Express 2500 5.7L ABS module VIN: 1GCGG25RX2
Driver states ABS light on. Drove vehicle no light on at this time,scanned for codes with snap-on modis(has current updates)no codes present. However, have wheel speed sensors fluctuate from negative speeds to up over 200 mph with engine running and vehicle no...
2003 Chevrolet Trailblazer LS 4.2L No start
This Trailblazer had a problem with the HVAC system not working. Then the fuel gauge started to read incorrectly/not at all. The vehicle still ran fine until two days ago. Now it won't engage the starter motor and the key won't come out of the ignition lock cy...
2004 Chevrolet Malibu 2.2L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1ZS52F04
this vehicle came to me third hand. it has no power under acceleration. the trans does not shift until you let off the gas. watching scan data- map shows 10.[...] of vacuum, rear o2 785mv., both tps sensors show no voltage. we tried reflashing the ecm, a ma...
2004 Chevrolet Classic 2.2L Gauges/Dash Lights/Blower Motor VIN: 1G1ND52FX4
Hello all, I'm posting this Malibu for another technician in the shop. The customer complaint is intermittently the instrument cluster/gauges will read erratically, the Service Engine Soon and Theft lights will come on, and the blower motor will stop working. ...
1996 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: IG2JB1248T
This vehicle came in with the complaint of the mil light on and stalling at times. We scanned the car to find code p0172 and p0301. We found the #1 injector to be bad and replaced the injector. The injector was put in without the lower o-ring and one thing lea... Trouble codes: P0303, P0172
1996 Pontiac Firebird Formula 5.7L starter VIN: 2G2FV22P7T
We have a 96 firebird that came in for a starter grinding. The nose was broken off and we replaced it. The car came back again for the same exact problem, so we tried once again to replace the starter. The third time whith the same problem, we noticed some pro...
2002 Pontiac Grand Am SE 3.4L fuel pump VIN: 1G2NF52E92
Hello fello GM lovers, I need some assistance. I do not have 12 volts to the fuel pump at the jucntion under the car by the passanger rear tire. The code that I got from this car was P0230- Fuel pump relay control circuit malfunction. The relay tested ok. The...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac DeVille 4.9L heating VIN: 1G6CD13BXM
thanx to all who replied iatn is great replaced heater core and heat is hot on both sides weird problem but all is good thanx again.
1995 Chevrolet K3500 6.5L 4 WD Fuse VIN: 1GBJK34F5S
We are going to install a manual 4wd switch inside the truck purchased from Summit. It will eliminate all of the electrical problems from the starter being pushed into the wiring harness and ruining it.
1998 Chevrolet Cavalier 2.2L temp VIN: 1G1JC5243W
Thanks for your replys.I fixed car 2 weeks ago but wanted to wait to see if it would return,it has not!! I did several things first drilled hole in t-stat did not fix but helped ,next bypass heatercore with hose no help,vacuum filled numerous times nohelp,repl...
1998 Chevrolet Cavalier LS 2.2L starting cold VIN: 1G1JF5242W
as it turns out this vehical had a bad ins. cluster. replaced ipc and vehical starts fine now even when cold thanks to all who replied and to john from wisconsin who had me look at the ipc
1998 Chevrolet Cavalier LS 2.2L No Start VIN: 1G1JF5242W
tried to run the relearn procedure and it wouldnt work then i noticed when it would start and quit in the morning that the tach didnt work and the only light that came on before starting on the ipc was trac control i heard from a few people that these had a pr... Trouble codes: U1016.
1999 Chevrolet Silverado 2500 6.0L Hesitation VIN: 1GCGK29U0X
Thanks to all who responded to my post. I waited to respond to see if any of the initial repairs made any improvement. As I mentioned in the original post, the fuel pressure would leak down slightly after 1 hour. The truck also had a questionable MAF sensor an... Trouble codes: P0463.
1999 GMC Yukon Denali SLE 5.7L low or no pedal VIN: 1GKEK13R7X
Sorry about the delay- I have been using up some much-needed vacation time. I will post this as a 'not yet fixed '- but I have a feeling that the problem is at the frt ABS sensors- just haven't had time to get to it. However, I will mention that I have been dr...
1987 Oldsmobile Calais 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, VIBRATION VIN: 1G3NF54L6H
IT'S fixed as indicated in the post. I searched the fix data base before bothering others, and got the fix from there. the reason for the post was to say thanks again for all who care to help others! P.S I read and replied to a request on the 24th, and was a b...
1987 Oldsmobile Delta 88 Royale 3.8L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G3HN5436H
well i removed the timing cover per customers request, and found that the timing chain tensioner fell apart and caused alot of slack in the chain the engine was about 10 degrees out of time, but the customer chose to junk the car rather then do any more repair...
2000 Saturn LS2 3.0L MIL Lamp on VIN: 1G8JW52R2Y
after all that my wiring diag was wrong.i called a friend and ck'd his diag.we had a broken wire from ecm to o2 sensor ecm wire f2 grn was broken from ecm pwr to o2 pwr plug.all is great thanks for the help will talk later Trouble codes: P0030, P0050.
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