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Prev Professional Automotive Repair Technical Discussions for April 11, 2007
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52L2S
Hi Guys, This one is personal, it's the wife's car. Check engine light came on and off so I decided to put it on the scanner. Code PO341 cam up, so I started by putting in a cam sensor. Light came back on, so I put in a crank sensor and a new balancer, I didn... Trouble codes: P0341
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: Y7TU298849
Code p0340 IC cam signal no freq comes on istantly. Have Good cam signal going to ign control module. No signal coming out to pcm. Check all grounds & wires to ign module & pcm have tried known good cam sensor, ign module, & pcm. Suspect cam timing off, if is ... Trouble codes: P0340
1997 Cadillac DeVille 4.6L Misfire VIN: 1G6KD54Y6V
Vehicle came in for misfire & engine light, retrieved code PO300 -Misfire is ONLY in cylinder #1 fuel pressure at specs, no vacuum leaks found -after checking voltages determined needed to replaced fuel injector, plugs & Wires - problem fixed??- sent vehicle w... Trouble codes: P0300
1990 Chevrolet Lumina 3.1L Hesitation, Cuts out, Stall VIN: 2G1WL54T0L
Any help would be appreciated on this chevy. We are the third shop to see this car and I am not sure what was done before us other than a tps sensor. What this thing does is it will idle all day long if you wish but when you give it the gas in gear it will bog... Trouble codes: 35 (idle air control)
1995 Chevrolet K2500 Cheyenne 7.4L Clutch VIN: 1GCGK29N8S
Had removed trans. and had it rebuilt in Feb. Upon installation clutch disengagement was low to the floor...bled system and appeared to be OK. 1st and 2nd synchro shifted a bit hard, but otherwise seemed to be ok. Advised customer to drive for a few days and c...
1995 Chevrolet P30 Van 5.7L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GDHP32KXS
Engine dies at idle after engaging in gear sometimes both foward and reverse. Checked fuel pressure reading 10 lbs @ idle. Checked timing and it reads correct. Checked for vacuum leaks. Checked Map sensor. Checked coolant temp sensor. Checked grounds. Checked ...
1996 Chevrolet Cavalier 2.2L Cuts out, Stall VIN: 1G1JC1246T
customer states vehicle stalls out while driving. problem occurs between 10-60 mph no warning or hesitation vehicle just cuts off. will take aprox. 5-10 minutes before restarting and vehicle will run normally for days to weeks at a time. the last time the prob...
1997 Chevrolet C1500 Suburban 5.7L Cuts out VIN: 1GKEC16RXV
If you hammer this vehicle from a dead stand still you can feel a slight shurrder or cut out for a split second then it's ok. When cruising 45 to 50 mph if you encounter a slight hill and accelerate lightly to maintain speed the vehicle cuts out badly and will...
1998 Chevrolet Express 2500 4.3L Poor Idle Quality, Misfire VIN: 1GCGG25W1W
Hello fellow techs, Please read and reread before repling. R@R engine with reman 4 months ago. Customer came in with no start 3 weeks ago. CKP sensor power wire was shorted to exh. manifold, only powe wire ground and signal was fine. I popped pcm fuse. Tech ...
2003 Chevrolet Silverado 2500 HD 6.0L Turn signal and hazard VIN: 1GCHK29UX4
The hazard lights and turn signals will work if you leave the truck set for a while but if you the lights will work but if you run the turn signals or hazards for a few minutes.They will shut off and not come back on this also happens while driving down the ro...
2006 Chevrolet Monte Carlo SS 5.3L oiling VIN: 2G1WL16C26
I have not experienced the symtoms yet. Complaint that since day 1 car "loses" 1 qt of oil every 500 miles. Driver says after you drive 10 miles intermittanly you get a burning smell and smoke out the tail pipe. Also it will idle high, vibrate, and is loud---...
1998 GMC Savana 2500 5.0L abs module VIN: 1GJFG25M5W
this vehicle came in for abs operation during normal braking (this problem is very intermintant). we had left and right front wheeel speed sensor open or short to ground codes,check all wiring no problems were found. scoped all 3 wheel speed sensors found the ...
2002 GMC Envoy SLE 4.2L Alternator VIN: 1GKDT13S22
Help GM Guys, This Envoy came to us on the hook with a died while driving complaint, no lights on dash present, not even regular idiot lights. We started by checking the fuses and found that the covers had been missing for some time. We interviewed the custome...
1995 Oldsmobile Silhouette 3.8L no heat VIN: 1GHDU06L4S
hi group. this van is my family van. before it have heat. then i replace intake gasket due to oil leak and thermostate with new coolant. then i haven't used the heat during summer . then now it have no heat. the gauge show only below middle. but my scanner sho...
1996 Oldsmobile Cutlass Ciera 3.1L Cuts out VIN: 1G3AJ55M5T
I am looking for help on this ciera here. At times, it will stall. 99% of the time it will start right up with no problems. The other 1% will carnk only. All PIDs on scan tool are normal. I hooked up a fuel pressure gauge and it sits at about 35 p.s.i. til pro...
1998 Oldsmobile Intrigue GL 3.8L Hesitation, Stall, MIL Lamp on VIN: 1G3WS52K7W
this car runs great except when the maf blows! in the last year i have replace the maf 4 times. it always turns on the mil and sets a code. all of these i have got from napa. i am trying one from the dealer this time. my question is, "is there someting that co... Trouble codes: P0102
2000 Pontiac Bonneville SSEi 3.8L Stability Control VIN: 1G2HZ5414Y
Customer has had this issue for a long time and got tired of the dealer throwing parts at it. We test drove the vehicle and found the stability control engauging traction control while turning into parking lots or steering the vehicle in a bit of an aggresive ...
2001 Pontiac Aztek 3.4L cooling fans VIN: 3G7DAO3E41
This Aztek came in with a severe coolant leak at the intake manifold and slightly milky had no telltale smell of a head gasket problem. We explained to the customer thst we needed to start with an intake gasket, flush the engine and cooling sytem and ho...
2003 Saturn Vue 3.0L bcm VIN: 5GZCZ63B53
car came in with flagging coolant temp & fuel guages, very consistant every three seconds also a temp light comes on every time the guages flag up. ive replaced ignition lock cylinder for key coming out with vehicle running, also a the same time im replacing b...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick LaCrosse CXS 3.6L pass key VIN: 2G4WE53715
thank you dennis from florida, you were right on wtih this one. thanks to everyone else too, i really appreciate all of the input. the way to do this particular vehicle is cycling between on and off, not start and on. i went with the 10 min 45 seconds on, with...
1998 Cadillac Eldorado ESC 4.6L MIL Lamp on VIN: 1G6EL12Y7W
Thanks for all the info but Ijust have to work this one out I have cleared the ECU again flash the memory by holding the 2 terminals together and now the readiness code are resetting am still trying the additive in the trany for the code P0741 TCC Thansk again...
1982 Chevrolet LUV 2.2L Starter VIN: J8ZBL14S3C
This vehicle is NOT fixed because I could not get an accurate wiring diagram. Craig's link to is a great link. but the wiring diagrams were for GAS engines. There were NO wiring diagrams of ANY system in Nodata for '82 Isuzu trucks. I consider...
1995 Chevrolet K3500 6.5L no power VIN: 1GBHK33F7S
This one is fixed! Gerald & Brent hit it. the Catalytic converter was plugged. I disconnected it and went for a drive, and it runs perfect. I dropped it off at the muffler shop, and they installed a new cat. Not gonna lose sleep over the wierd numbers on the c...
2000 Chevrolet Astro 4.3L no start VIN: 1GNEL19WXY
Great information from the 5 replies I received even though I had given very little information to go on. 1st issue: It isn't a security problem without the 'security' light on or blinking. A good start to this problem as most replies pointed to other issues w...
2003 Chevrolet Silverado 2500 HD LT 8.1L abs VIN: 1GBHK29G73
I would like to thank all that helped, He was a plumber and needed his truck. He stopped by the dealer and the po550 code is a module in the dash. they told him he would have regular brakes, but no antilock. So he is driving it the way it is. Again thankd for ...
2003 Chevrolet Express 2500 4.8L Misfire, MIL Lamp on VIN: 1GCGG25V23
Thanks for all the help. You all were a big help as usual. We removed the cylinder head and found the #3 intake valve was leaking. Inspected the springs, ok. Removed the other head and it was ok. Replaced the #3 intake valve and touched up the other valves. An... Trouble codes: P0300.
2004 Chevrolet Silverado 1500 4.8L Hesitation VIN: 2GCEC19V44
well i just want to thank everyone that took the time to read and suggest on our problem child,well i will say that this one is fixed found that the tac module was the problem we noticed that the truck would act up more when hot,so we went aheead and with heat... Trouble codes: P1516 (electronic throttle mod vs throttle position), P2135 (tp sensor 1-2 correlation).
2004 Chevrolet Trailblazer LS 4.2L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, pending codes only VIN: 1GNDS13S84
The boss decided that we didn't want to dwell on this vehicle in any lenghthy process to make repairs or figure out what was wrong with it and refunded all the customers money even for properly repaired items from the previous repair order. Many thanks for all... Trouble codes: P128, P130, P133, P300, P014.
1999 GMC Sonoma SLE 2.2L spark plug VIN: 1GTCS1946X
Well fellas, Here's the deal. The customer considered his options and finally decided to trade up to a Toyota. I'm always amazed at the quality of info on IATN. Since there was no fix I'll include the reply info. Jordan, Stephen and Art advised against install...
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