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Professional Automotive Repair Technical Discussions for January 28, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1989 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54C7K car will not start when it gets below 10 degress,cranks ok,acts like it is flooded,can hold to the floor and it will back fire sometimes,some times it act like it wants to start,have checked fuel pressure ok,montiored crank sensor ok,ect sensor ok,t.p.sensor o... |
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| 1997 Buick LeSabre Custom 3.8L fuel gauge VIN: 1G4HP52K2V Well thanks in advance. I got this buick with the conplaint of fuel gauge not working properly.As soon as I started to test system gauge started to work. I guess my next door tech had already replace sending Unit and now is back again for same problem. Anyways... |
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| 1998 Buick Park Avenue Ultra 3.8L steering VIN: 1G4CU5218W Greetings Techs, This car has been to 2 other shops for the same problem. Now we have it. It has a growling noise with vibration when turning to the right. We test drove it in a parking lot and the noise/vibration is very easy to duplicate while making circle... |
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| 1999 Buick Park Avenue 3.8L harsh engagement VIN: 1G4CW52K4X hello all. We have this park ave. with an intermittant harsh engagement when cold. worse in reverse. Tested line pressure and commanded pcs several times all the way through the chart and all is good most of the time. At one point I had over 155 psi for about... |
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| 1997 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2GCEK19RXV Truck was brought to us with intermittent cel and lack of power, no passing gear, will not get [...] mph pulling trailer, customer siad will get to about 70 mph without trailer. Runs good at idle & under light acceleration. Under heavy load vehicle loses al... Trouble codes: P0131 (ho2s b1s1 volts low), P0135 (ho2s b2s1 volts low) |
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| 1999 Chevrolet Silverado 1500 4.8L blend door motor blend door motor sticks in other positions now then starts working again for a short time. mechanism seems fine. suspect feed back potentiometer on blend door motor assembly has any one ran in to this before? |
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| 1999 Chevrolet Express 2500 5.7L No Start The computer in this vehicle has been replaced 3 times. After about 3 weeks the vehicle stalls and will not restart. Upon inspection, the computer has erratic readings including fuel trim at -75% or lower, ect at 411 degrees, spark advance at 200+ degrees. I h... |
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| 1991 GMC Sonoma 4.3L blower motor fuse VIN: WW25F567TC keeps blowing fuse for blower motor, I read tsb on ash tray rubbing harness, not that amp draw on blower is only 8.5 amps seems ok with no noise. disconnected bloer switch and temp demand knob still blows fuse with out much rime or reason. where is the blend d... |
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| 1993 GMC K3500 Sierra SLE 7.4L defroster door VIN: 1GTHK39N7P Hi Everyone, a piece of the heater fell out from under the dash on this truck. It is flat and about 3" long, it consists of 3 pieces with a spring in the center. The defroster door will no longer open to allow air onto the windshield. It looks like I will need... |
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| 1996 GMC Safari SLE 4.3L Heater VIN: 1GKDM19WXT I have a customer that is a school crossing gaurd 10 blocks from her home. Last year she said the van just didn't heat up to good. I installed a thermostat and was OK until it got really cold(under about 10 degrees or colder). At that time she returned van to... |
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| 1999 Oldsmobile Silhouette Premiere 3.4L valvetrain VIN: 1GHDX03E3X Hello! I'm working on a 3400 engine for an external coolant leak @ the intake gasket. While diconnecting the rocker arms & push rods, I found the tips of the push rods were worn/scored, only @ the rocker arm end? lifter end is ok! Is there a commond problem wi... |
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| 1995 Pontiac Grand Prix GT 3.4L Timing belt VIN: 1G2WJ52X9S The timing belt and tensioner were replaced as normal maintenance. After about a thousand miles the engine developed a loud over tensioned timing belt whine. On disassembly the belt was exceedingly tight and the bracket behind the tensioner was broken. The bel... |
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| 1995 Pontiac Grand Am SE 2.3L Cooling Systems VIN: 1G2NE15D1S This one overheats when loaded. No suspected combustion in coolant. Doesnt use antifreeze, will run hot but not overheat on cold days. Radiator stays ice cold, temp runs from 220 to red zone real fast as driven only. Has now had new radiator,water pump(afterma... |
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| 1999 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDU03E1X This vehicle came to the shop with 3 codes p0440,0453,0463,I was not at the shop and no problems were found. The vehicle came back in with the code p0440 evap emissinos problem. I have smoked test the entire system and i can not find a leak. I have tested the ... Trouble codes: P0440, P0453, P0463 |
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| 2000 Pontiac Grand Am SE 3.4L Idle surging VIN: 1G2NF52EXY Scan codes to find old code PO171 in history, cleared codes and drove car till hot and only in park does the idle search from 450-1289rpm. Will continue doing this a long time then die, but starts right back up.The O2 B1 S1 varies with the surge 74-135mv. The ... Trouble codes: P0131 (O2 sensor bank 1 sensor 1) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1996 Cadillac DeVille 4.6L Poor Idle Quality, Surge VIN: 1G6KD52Y2T Car has not returned for further service. Possibilities that were sent to me include bad grounds, and possibly the throttle body gasket being on backwards can make it seem like a vacuum leak and elevate the idle. If it ever comes back, will update this. Thanks... Trouble codes: P0507 (Idle Control System RPM too high). |
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| 1986 Chevrolet Celebrity 2.8L No Start VIN: 1G1AW19W0G This car is finally fixed. Turned out to be the thermo switch for the cold start injector. Ed [...] were right on the money, most every one else was close talking about the injectors or CTS. A BIG Thank you to all who respond... |
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| 1995 Chevrolet Beretta Z26 3.1L abs-rear brakes VIN: 1G1LW15M1S thank you james from manitoba and deke from ohio your thoughts helped me to remove the abs module . iwas going to replace abs pump and gears. when i pulled the lower cover off i saw the nut that holds the gear to the axel was loose .the main gear was not in me... |
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| 1996 Chevrolet Cavalier LS 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G1JF5247T while waiting for replies I ran fuel pressure test pressure was at 30 psi 41-47 is spec. whle running pressure would drop to 15 then up to 30 so we removed pump. inside tank was debrie from pump motor we cleaned tank installed new fuel pump module $$$ all I ca... |
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| 1998 Chevrolet Tahoe LS 5.7L Interior lights VIN: 1GNEK13R3W HI Guys, Well I got several replies that stated that the light control module was located where my Mitchel info said (underneath the center of the dash), but again, not there! One reply said that if equiped with keyless entry then the light module is combine... |
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| 1999 Chevrolet Blazer 4.3L lights VIN: 1GNDT13W3X the problem was the auto zone alt,we installed one from napa and the charging system worked fine,most said that they had trouble with auto zone alts,some said idle speed,some said check grounds,thanks for the help |
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| 2001 Chevrolet Silverado 2500 HD LS 6.0L engine VIN: 1GCHK23U11 Truck is currently sitting under 3 feet of snow in dealers back lot while fight continues. At this point dealer is refusing to cover any part of repair. Customer has contacted GM customer service and is waiting response. |
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| 1994 Geo Prizm 1.6L brakes/abs VIN: 1Y1SK5365R well guys ,after replacing the speed sensors customer has stated no more problem with hard pedal thanks |
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| 1991 GMC C7000 Topkick C7H042 6.0L Excessive Emissions, Cuts out, MIL Lamp on VIN: IGDJ7H1POM those of you that said reluctor were correct .installed lab scope checked signal for dist to ecm and what do you know ac sine wave present .replaced shaft and pick up assy.works good now. special thanks to kent [...]. after repairs retested with scope nice squar... Trouble codes: 33 (map sensor). |
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| 2001 Other GM motorhome 8.1L No Start VIN: 5B4LP57G71 wire to ignition switch lost signal when cranking. igntion 12v was ther but not on crank gm has had problems with ignition switch .must repalce and repair wires |
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| 1995 Pontiac Grand Prix SE 3.1L anti theft system VIN: 1G2WJ52M0S 1st problem we discoverd was, that there was a short in ign switch. then after repairing that problem car would start and immediately shut down, no inj operation, ended up having to replace ign key, resistor pelet worn out |
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| 1997 Pontiac Sunfire SE 2.2L Poor Idle Quality, Stall, lacks power at times VIN: 1G2JB1245V Thanks to all that replied to my help request I checked out and followed through with all suggestions. In the end I was able to watch fuel pressure while ldling in the shop and It proved the fuel pump was cutting out. A follow up call to the customer 1 week af... Trouble codes: P0171, P1601. |
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| 2000 Pontiac Sunfire SE 2.2L Stall, MIL Lamp on VIN: 1G2JB124XY Test drove and was finally able to duplicate the condition and take a movie of it happening. While drive coolant sensor was at 198 deg. and started steadily dropping to -40. then started running a little rough until it came back up to normal temps. it also set... Trouble codes: P0420. |
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