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Prev Professional Automotive Repair Technical Discussions for December 28, 2006
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Eldorado ESC 4.6L Blower motor VIN: 1G6EL12Y5X
This is the second similar cadillac we have had in the past three months with the front blower motor inop. We had to send the last one to the dealer for repairs and they wont give us the info of what they did to fix the last one. the rear blower works but the ...
2001 Cadillac DeVille 4.6L Poor Idle Quality VIN: 1GEEH90Y71
Vehicle idles high sometimes, sometimes idle will drop off and car will stall. code P0507 stored but has not come back.Vehicle RPM @ 1100, desired rpm 1000, vehicle spec @650.When commanding idle with Tech 2 willdrop down to 500, but IAC count never drops belo... Trouble codes: P0507 (Idle System High)
2004 Cadillac SRX 4.6L tracking system?. VIN: 1GYDE63A54
Hello. Hope you all are having a happy holiday! A customer brought in his vehicle having troubles with his brakes. According to the owner of the car, he is having trouble with the brakes when driving downhill to slow the vehicle. But the problem only occurs wh...
1985 Chevrolet K10 Scottsdale 5.7L hydraulic VIN: 1GCEK14H7F
on this 4x4 chevy, customer's complaint is a brake pull to the right. after test driving, just calling it a pull does not do it justice. on moderate braking, it pulls to the right. on hard braking, it will snatch you into the ditch. we check all brakes. calipe...
1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC124XT
This Cavalier arrived as cranks won't fire. Theft light on steady, ABS & SIR lights on, low coolant light on with no PRNDL light indicator.Codes P1601(Serial Data) & P1629(Theft Deterant). Scan tool would not communicate with ABS, IPC or SIR. I disconnected ig... Trouble codes: P1601 (Serial Data Bus), P1629 (Theft Deterant Crank Signal)
1999 Chevrolet K2500 5.7L batterys VIN: 1GCGK24R2X
hi guys this one has me. this truck will start fine if you use it every day. if you let it set for 3 days it is very slow to start. now if you leave it for four days there is no power left at all. we have tried this with just one of the two batterys hooked up ...
2002 Chevrolet Suburban 1500 LS 5.3L elctic VIN: 3GNKF16Z32
hi all steve from palmis tire and auto i have a 2002 chevrolet suburan keeps blowing ecm fues i can put truck in park and give all the gas i whant and fuse will not blow put truck drive and give it gas it will blow ecm fues truck in drive dont give it gas and ...
2002 Chevrolet Suburban 1500 LT 5.3L No Start, Stall, MIL Lamp on VIN: 1GNFK16Z62
Truck was towed in for a no start. the engine light came on and about 1000 more feet the truck cut off and would not restart. Towed in and found the 2* fuse blown (says Ecm fuse on fuse box cover)Replaced the fuse and the truck start right up. check codes and ... Trouble codes: P0179
1998 GMC K1500 Sierra SL 5.0L No Start VIN: 1GCEK19M4W
Towed in, no start. Checked fuel pressure, 60 lb, marginal. Installed motor vac with shop fuel, adjusted fuel pressure to 64 lb. Checked for injector leak down, marginal for #7 at first but detergeant must have cleaned it and it now seals. Plugs were soaked, c...
1999 GMC Yukon SLE 5.7L 4-2 cut loose VIN: 1GTEK19RSY
First let me say thanks in advance for your time reading this post. Vehicle downshifts to second gear accroding to scan tool data, above 60 mph hard accel 3/4 throttle and above, just revs to rev limiter until you back off throttle, then catches third gear, ow...
2000 GMC Sierra 1500 SL 4.8L 2-3 3-4 shift VIN: 2GTEK19V8Y
Need some help from u GM tranny guys. The customer reports that the truck was working fine. He accelerated to pass at 65 km, the trans kicked down, shuddered and is now stuck in 2nd gear. We have road tested to confirm that it is stuck in 2nd gear. Snap on sca...
2004 GMC Sierra 3500 SLE 6.6L Poor Idle Quality, Surge VIN: 1GTHK33244
We have this 6.6 gm. When stopped with brake on it surges up and down. Hot right know between 50 to 100 rpms. There is no codes to go follow. Customer says its worse the longer it idles. With tech 2 on and watching pids [on tis 2000 graph mode from a movie] th...
1992 Oldsmobile Achieva S 2.3L Stall VIN: 1G3NL1433N
hello techs,we have a olds achieva that sets code 42 everytime u clear it and crank it comes back on.we replaced the ignition module with new ac delco module but still code comes back on.will the ecm put this code in it we checked all ecm connections but all a... Trouble codes: 42 (electronic spark control)
1998 Oldsmobile Bravada 4.3L blend door motor VIN: 1GHDT13W0W
Hi Folks, 98 bravada/blazer auto a/c has full heat all times! tried new blend door motor/sensor still goes full hot.. tested wiring pass. codes 408 and 416 temp circuit and high. Is it the control head or a separate module? head is $700.. module is $150.00 ??...
1999 Pontiac Grand Am SE 3.4L slips in drive after hot start VIN: 1G2NE52EOX
Thanks in advance for your help. I have never been inside one of these units. I know transgo has a reamer kit for one of the bores in the vale body, but figured I would get some help from someone who knows more about these than me. The customer came in statin...
2000 Pontiac Grand Prix GTP 3.8L converter VIN: 1G2WR5217Y
Happy Holidays everyone: This one came from a dealer. They changed the Tcc solinoid but the Tcc still intermittenly stays on. It does not stall the vehicle, it only locks when it gets to 2nd gear and up. As you slow down, it unlocks as the trans goes back to f...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Roadmaster 5.7L Poor Idle Quality VIN: 1G4BN5371N
Thanks to all that replied. Sometimes we just miss the obvious. Did a smoke test and found the underside of the pcv hose had a split in it. Thanks again.
1986 Chevrolet C10 Custom 5.0L Poor Idle Quality, Stall VIN: 2GCDC14H7G
I threw in the towel on this one. I charged the guy for the fuel pump (pressure was out of spec.)a vacuum advance (was inop.) and to set the timing. I refunded the $300 or so more that the carb. had cost (reinstalled his carb.). I got a lot of replies on this ...
1989 Chevrolet C2500 Cheyenne 5.7L rear brakes VIN: 1GCGC24K8K
It seems everyone said it was the rear brake hose. I remove the brake hose and blow into it forward and reverse. It seems to be the same as the new one. So I use compressed air and blow back and forth. Then blow with my mount and it was hard one way. I replace...
1996 Chevrolet Camaro 3.8L theft system VIN: 2G1FP22K4T
Thanks for all the replies, I am going to call it fixed altough time will tell. It appears the problem ended up being the new key resistor (thanks Joe [...]). The key now reads one number different than it did when I fixed it the first time. The resistance is ri...
1997 Chevrolet Monte Carlo LS 3.1L Cuts out VIN: 2G1WW12M2V
the problem with this vehicle turned out to be a bad engine. the knock sensor will pick up the knock and start retarding the timing. thanks for the help
1997 Chevrolet S10 2.2L Pressure plate VIN: 1GCCS1441V
Thank you so much for your support guys . Richard [...] gave the correct guidance . I so carefully measured flatness of the flywheel and disregarded the pressure plate because it was a new Delco unit . I found .012 out of flat ...
1998 Chevrolet Prizm 1.8L Lighting VIN: 1Y15K5283W
I would like to thank everyone for their responses. I would especially like to thank Robert [...] for faxing us a copy of a service bulletin for this problem on this particular car. The bulletin talked about a bad ground or open connection can smoke these modul...
1998 Chevrolet Venture 3.4L Power Steering VIN: 1GNDX06E3W
Thanks for the help. No the power steering lines had not been replaced in previous repaires. All hoses good no leaks and none hitting body. Gary unable to find updated hose OEM. Did give Customer estimate to replace hose being we feel this is the source of the...
2000 Chevrolet K3500 7.4L 4-wheel drive VIN: 1GCHK33JXY
With info I received,customer went to another dealer and was able to get the needed part. The # is [...]. This is a GM# on the package the part came in. Also says relay trfer c on it--guess that means relay,transfer case. Thank You everyone for your help.
2001 Chevrolet Silverado 2500 HD 6.6L ses VIN: 1GCHK29141
This truck is fixed. I replaced the nuetral safety/back up switch on the left side of the trans. I had the 'black' switch on the truck and replaced it with the 'brown' updated switch. I also noticed the 'glue' or i believe ckt board coating that seeped out at ...
2002 Chevrolet Suburban 1500 LT 5.3L parking brake VIN: 1GNFK16Z42
Thanks to all that replied. We finally got this truck back from the customer. We removed rear rotors and check for spacer inside of adjuster (it does look like a tic-tac) - operated cables made sure eveything moves - adjusted shoes to slight drag. Same result ...
2005 Chevrolet Silverado 2500 HD 6.6L Hesitation VIN: 1GCHK29275
First I want to thank everyone for all your help and ideas. A couple people mentioned there is now a recall on the fuel injectors so it is back at the dealer now and he is pushing for that to be done. He is now dealing with the owner of the dealership hoping h...
1998 Pontiac Trans Sport Montana 3.4L abs module VIN: 1GMDX03E2W
I still don't understand this one. I started to question the EBCM even though I had changed it. I started to unplug different items & then see what kind of codes I would get on power up. With the motor pack unplugged I still got c1245 but also would get c1266 ...
2002 Pontiac Montana 3.4L 4th gear VIN: 1GMDX03E92
thanks to all turned out to be just what eveyone said worn internal splined shaft. client wanted to a few dollars so we install a decent used trans. all is working normally at this time
2002 Pontiac Grand Am SE 3.4L fuel pump VIN: 1G2NF52E92
Well, the Grand Am is fixed. I want to thank everyone who offered help. For those who said the fuse/relay block could be bad were right. I got a fuse/relay block out of a 2002 Grand Am at a salvage yard and what do you know after I installed the different bloc...
1994 Saturn SL1 1.9L power steering pump VIN: 1G82ZH559X
Thanks for all the responses. I ended up getting another evo solenoid from the dealer and it worked perfectly. The evo that came in the dealer pump was a reman. solenoid. The part must have been bad. Thanks again to everyone!!!
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