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Professional Automotive Repair Technical Discussions for October 23, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K2Y Hello, I have a intermitten misfire only on start up when engine is cold only. Replace upper intake, smoke intake system no leaks found. Substitute good know parts like EGR, MAF, Ignition module. Swapped coil, plug, plug wire and injector from cyliner 6 to cyl... Trouble codes: P0300, P0306 |
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| 2002 Buick Rendezvous CX 3.4L Cooling Systems VIN: 3G5DA03E82 thanks in advance for any help.vehicle came in for overheating,removed heads checked for warpage.head gasket on # 2 cylinder was blown,no warpage , replaced gaskets & temp guage goes to 3/4 mark then down to 1/3 mark.hc's present in coolant system.tore back do... |
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| 1978 Cadillac Seville 5.7L No Start VIN: 6S69B80480 came in on the hook, customer asked me to get running. finding no fuel pressure traced back to in tank fuel pump. I replaced the pump and all rubber lines which were trash. My pressure is now 40 lbs but no start. I have good spark. I found I have no power to t... |
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| 1987 Cadillac DeVille 4.1L compressor VIN: 1G6CD1182H Vehicle came in two months ago with A/C inop. Compressor would not engage no matter what switch was jumped or what wire was grounded. Replaced power module with a used module, and compressor engaged. System was charged with leak detection dye added. Vehicle re... |
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| 2000 Cadillac Catera 3.0L TCM code U2108 VIN: W06VR54R9Y Client called to say that three lights were on dash and there was no speedometer function. Check engine, ABS, and traction control were the lights that were on. When the car arrived everything was normal again except the TCM and ECM had each recorded code U210... |
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| 1988 Chevrolet K1500 Cheyenne 5.7L Cuts out VIN: 1GCDK14K2J Folks, I reached the end of my wits. Truck cuts out from 1/4 second to a couple seconds. at idle it will die occasionally. First I replaced the module as I had a spare, no change. I checked the spark with timing light and light keeps blinking while the engine ... |
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| 1997 Chevrolet Astro 4.3L clucter,turn signal,radio.and brake lights VIN: 1GNDM19W2V we lose the instrument panel gauges headlights work low beam when ignition is in the on position when headlights are on the dash does not work.. we have replaced the ignition switch as someone has told us to we still have a problem with the same issues.. |
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| 1999 Chevrolet K1500 Suburban 5.7L injector replacement VIN: 3GNFK16R1X Thanks in advance, this is a bit of a diffent request. I have this 5.7 with the csfi fuel injector system. Need to replace a couple of injectors. Has anyone ever used the "mini-injector" assy. from Linder Tech.? I have gotten lots of injectors from them in the... |
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| 2002 Chevrolet Trailblazer LS 4.2L radio VIN: 1GNDT13S22 radio went out on it so customer went to salvage yard got 1 that was identical, face,elect. plug ins ect... installed it was locked so customer took it to chevy dealer they said it would'nt work because it was from an 05 trailblazer. does anyone know how to un... |
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| 2004 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH52K94 Vehicle driven in once, towed in second time for intermittent crank/no-start. She states the security warning flashes, she can duplicate the problem using the remote unlock feature but she can't prove it here. She also claims to be able to start it most times ... |
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| 2004 Chevrolet Epica LS 2.5L Poor Idle Quality, Stall, MIL Lamp on VIN: KL1VB52L64 vehicle intr. stall at stop harsh shift, runs rough. I have no acess to info on this dealer only, model is not even listed in all data or any of are other resources, I thought I would give this a try sorry about the lack of dio info. Perhaps maybe someone else... Trouble codes: P0175, P0172 |
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| 2005 Chevrolet Silverado 2500 HD 6.6L coolant VIN: 1GCHK23235 i am getting ready to do a major service on this 05 2500HD with a 6.6l diesel. my question is this...when doing a coolant flush on these GM diesels, do i need to use dex-cool or can i use normal green coolant? also, are there side effects, if any, when changin... |
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| 1984 GMC C7000 .0L no power VIN: 1GDL7D1B0F Vehicle drives like throttle plates are not opening, acc pedal feels like it doesnt go down all the way, I think the problem is in the governor system. I only ever worked on one of these 20 years ago. I have no info on how governer works or how to test it. Hav... |
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| 1998 Oldsmobile Intrigue 3.8L Steering wheel VIN: 1G3WH52K2W Client complains of viberation in the steering wheel between the 10 and 2 position on slight turns intermittently. I can not make the vehicle act up on test drives. Unplugged the V.A.S. sensor and client states viberation still present. Any assiatance will be ... |
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| 2000 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL12T2Y i have ran numerous test on the ignition system even swapped a complete known good coil assembly and still the same thing happens cylinder 1 misfire at idle. fuel pressure 50 psi, injector has good pulse does anybody have any ideas Trouble codes: P301B (cylinder 1 misfire) |
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| 1992 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX3L3N1 hey fellow techs i've been working on this bonne on and off all week.We replaced fuel pump because i thought it was as simple as that because the pump wouldn't max press.I have checked iac it would go to 0 in park or nuetral in drive it will show 32 counts see... |
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| 1997 Pontiac Trans Sport 3.4L MIL Lamp on VIN: 1GMDU06E7V After getting her back and delivering her to the customer, he tells me that the next day the MIL came on and back she came. Makes sence as its a 2 trip failure (B). He said he looked at all the lines/hoses/connections ETC and replaced the canister purge valve ... Trouble codes: P1441 (evap system flow during non-purge) |
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| 2009 Pontiac Vibe 1.8L Fresh Air Recirculation VIN: 5Y2SM62843 Hi All, I replaced a leaking heater core of this vehicle after disassembling most of the dash and center console. Re-assembled and everything works properly except for the fresh air/recirculation air door. When the recirculation button is depressed, the green... |
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| 1994 Saturn SC2 1.9L shifting VIN: 1G8ZH1579R Hi Saturn techs. I have a very hard shift into reverse and all forward gears. It is somewhat of an intermittent problem, but has got quite consistent lately. I'm aware of the valve body, and electrical issues that cause this concern, however, I can't find a pr... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Cadillac Eldorado ESC 4.6L parking brake release VIN: 1G6EL12Y8X unable to duplicate in the shop---lubed up parking brake mechanism and customer took car---so far so good. g |
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| 1988 Chevrolet C1500 Cheyenne 5.7L throttle sticks VIN: 2GCDC14K2J Gentlemen We have the problem resolved. As stated in my post, we have as well as each of you have had, many of these in your shop. We did in fact have the throttle, kick down and cruise cables unhooked off the throttle body to eliminate them as part of or t... |
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| 1996 Chevrolet Corvette 5.7L oddometer VIN: 1G1YY22P7T Had a couple of sugguestions but fix was bought a used tech 1 updated with my old tis 2000 and had option to program new ccm worked like a champ I had called many dealers and corvette shop neither where any help |
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| 1998 Chevrolet P SERIES 7.4L No Start, Stall VIN: 1GBKP37JIW the only bad thing about this vehicle is its size no one wanted to drive it till problem show up after changing cam sensor and connector code po341 stayed away we test drove many miles and vehicle stalled only one time it lost spark crank sensor was good so we... Trouble codes: P0340, P1351. |
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| 1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality VIN: 3GNFK16R2X THE CUSTOMER SAID THAT IT RAN BETTER AFTER WE PUT A COUPLE OF AC DELCO PLUGS IN. IT STILL MISFIRES AND THE CHECK ENGINE LIGHT COMES AND GOES AND THE CUSTOMER WAS GOING TO GET IT EMMISIONED WHEN THE LIGHT WAS OFF SORRY NOT MUCH HELP. SOME OF THE OTHER RESPON... Trouble codes: P0300, P0420. |
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| 2003 Chevrolet Silverado 2500 6.0L belt, tensioner VIN: 1GCHC23U63 Hi All This fix was straight foward, I did not see the forest for the trees. a couple replies said water pump, a couple more said power steering pump. But 33 of you hit the nail on the head. Bad compressor. Replaced with new compressor from dealer, and now al... |
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| 2004 Chevrolet Silverado 1500 4.8L Engine VIN: 2GCEC19V34 Thanks much to all the responses. Even though the customer decided not to repair the vehicle at this time, I learned more about these newer Chevy engines, as I have not had to work on too many yet. I believe the problem is the lifters, and the problem in in... |
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| 2004 Chevrolet Workhorse 8.1L Failed ECM Flash VIN: 5B4MP67G44 I sent the ECM backeast for bench flashing. (it took a month to get it back.) I installed it and all is well. I think something on the vehicle was interfering with the upload or I let the battery voltage get too low,(GM says 12.5min). I did unplug the ABS and ... |
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| 2005 Chevrolet Impala LS 3.8L Misfire VIN: 2G1WH52K45 REPLACED PLUG AND RETURNED TO CUSTOMER. NO BODY ELSE SEEMED TO HAVE SEEN THIS WHICH I FIND STRANGE SINCE IVE SEEN IT A FEW TIMES. OBVIOUSLY IF IT COMES BACK IM GONNA HAVE TO DIG FURTHER AND ILL POST MY FINDINGS |
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| 1997 Geo Metro LSi 1.3L Air Bag VIN: 2C1MR2298V Thank you to Wade from CO. and Bob from PA. my only replies. The fuses were good, the horn did work. The vehicle was not in an accident. I unplugged and plugged all the airbag connections, checked wiring under the seat, was OK. When working properly the srs li... |
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| 1997 GMC Savana 2500 5.0L Misfire VIN: 1GTFG25M4V THANKS TO ALL WHO REPLIED, TIM FROM TENNESSEE WAS RIGHT ON WITH REFLASH VCM, WE RECEIVED TWO VCM'S AND THE AUTO WRECKER ASKED IF THE ENGINE WAS A 5.0L AND WE SAID YES, WE ASSUMED WE WERE GETTING A VCM AS PER APPLICATION. WE DIDNT AND CAUSED US A WHOLE LOT OF H... Trouble codes: P0341 (cmp sensor circuit). |
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| 1999 GMC Sierra 2500 SL 6.0L poor acceleration VIN: 1GTGK29U4X Thanks for all of the replies. I replaced the maf sensor like some of you suggested, even though I had cleaned it. The tip on unplugging the maf sensor and then driving it to see if the problem was gone, was right on. It runs very good and the acceleration i... |
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| 2000 GMC Sierra 1500 SL 5.3L fuel tank VIN: 1GTEK19T5Y HELLO THANKS TO ALL FOR YOUR HELP I AM SORRY TO SAY THAT THIS CUSTOMER HAS NOT RETURNED AS YET FOR FURTHER REPAIRS, SO I CANNOT AT THIS TIME REPORT THAT IT IS FIXED I DO THANK YOU FOR ALL YOUR SUGGESTIONS IF I GET THIS ONE BACK SOON I WILL POST A FIX, THANKS... |
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| 2003 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK23163 This truck took me a lot of testing time, troubleshooting procedure resume like this. - I could observe that while problem was present, I have very low fuel pressure (datastream from Tech II). - Did fuel pump max pressure test, Engine Idling and thr... |
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| 2004 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDS13S64 After all this time the vehicle finally failed long enogh to test it and, the correct fix was the ignition switch, thanks to the IATN member who sugested that, we never would have found it with out that reply. Trouble codes: U1000 (CAN Failure), U1041 (ABS Communication Failure). |
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| 1991 Oldsmobile 98 Regency Elite 3.8L ign spark VIN: 1G3CW53LXM First, thank everyone who took time to answer my request. now, after testing #1 injector for a short and adding an auxillary ground to ICM, with no change, I removed the ICM, sent it to my local parts house, they have a tester for all ICM's, it tested bad. Rep... |
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| 1999 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52T6X Hi and thanks to all who gave help. I went back to the car the next day and with my snapon vantage pro checked all the cicuits going to the ignition module. Crank signal(7x referance),IC1,IC2,ground,12volt supply,cam signal,all ok.while the eng was running I c... Trouble codes: P0304 (4 cyl misfire). |
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| 2002 Pontiac Bonneville SLE 3.8L battery goes dead VIN: 1G2HY54K72 thanks for all the replies so far i have found that the pcm is causing my draw. i am right now it the process of relearning my theft. hopefully this cures the problem, again thanks |
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| 2003 Pontiac Vibe 1.8L keyless entry VIN: 5Y2SL62813 Sorry it took so long. I could not get the guy to bring the car back until last Saturday. My sw did the program with no problem following the information provided by Steve and Kevin. It is the same sequence I used, but apparently i missed something. Thanks, Pe... |
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| 2000 Saturn LS2 3.0L Surge, MIL Lamp on VIN: 1G8JW52R4Y I really had no one give me the information I needed. I got to the point of saying it must be the ECM and had to send it to Saturn, as I do not own a programmer and the ECM was only available to Saturn. The big question is that there was a ground coming out ... Trouble codes: P0102 (Mass air flow low), P0727 (No RPM signal to TCM), P1780 (Transmission code - goes back to P0727). |
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