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Professional Automotive Repair Technical Discussions for January 7, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1993 Buick Park Avenue 3.8L oil pressure VIN: 1G4CW53L3P Parked car and ate. Started car and no oil pressure. Had drove car pretty hard 75+mph before stopping. Top end rattles like no oil. Pulled valve covers and all push rods in place. Pulled pan and found slight metal specks in oil. Felt of rods for slack. Number ... |
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| 1995 Buick LeSabre Custom 3.8L MIL Lamp on car will set mil as soon as started code po325 i have checked voltage at wire to knock sensor and its 4.87volts, when pluged in to sensor it will drop to 2.41 volts it has good wave form when checked with vantage cant find any reason for mil to come on have re... Trouble codes: P0325 |
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| 2000 Buick Century Custom 3.1L blower VIN: 2G4WS52J3Y Hi All, This car came in today to have its' wiper transmission and 1 wiper arm replaced--stripped arm & post. The owner said, "while it's here, check the blower--there's no high speed", and sure enough, as you step from 1 thru 4 the blower gets slightly faste... |
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| 1993 Cadillac DeVille 4.9L Heater core VIN: 1G6CD53B3P We have been having trouble keeping this Caddy owner warm. The very first time we saw the car, the heater core was plugged and the cooling system was in need of a flush, so we did it. (The coolant was dirty, but not overly so). Less than 2000 miles later, the ... |
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| 1989 Chevrolet C3500 Cheyenne 7.4L engine compression VIN: 2GBHC39N6K Pickup towed to shop. No start. Battery dead, charged battery then tried to start. No start. Checked for spark, No spark to plugs. Checked Rotor, does not turn when cranking. Removed timing cover and found both gears shot and chain off. Removed oil pan to remo... |
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| 1991 Chevrolet Astro CL 4.3L heating VIN: 1GNDM19Z6M this astro came in having a heating the pass compartment problem - idling in cold temps, it can keep up the inlet temp, just as soon as we drive it @ 80 - 100 kmh it gets cold inside, air vent temp runs at about 100 deg at idle but drops to 70 deg when driving... |
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| 1994 Chevrolet Astro 4.3L alternator VIN: 1GBDM19Z2R Hi Group, Van came in not charging.Has new battery.Have installed 2 reman. alts.Voltage on batt. wire is 12.85.Voltage on pink/blk is 12.44 with key on,also brown wire on reg. plug is 12.09 volts with key on.Voltage across battery is 12.60 volts running.Van ha... |
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| 1995 Chevrolet K2500 Cheyenne 5.7L Surge, Misfire VIN: 1GCGK29K9S Vehicle has a loss of power under load at about 1500-2500 rpm and if you keep constant throttle will lose power to 1000 rpm and then pick up throw you in your seat and go,almost as if the fuel has shut off but if you try to drive through it. It will backfire o... |
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| 1996 Chevrolet Blazer 4.3L No shift VIN: 1GNDT13W4T When cold, vehicle shifts fine. After warming up, does not shift at all and appears to be stuck in 2nd gear, even when first pulling out. Problem started after customer washed engine compartment. After problem started, fluid & filter, shift solonoids, and veh... |
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| 1996 Chevrolet Blazer 4.3L No signal to comp VIN: 1GNDT13W7T Why me? Truck came in with neutralizing 3rd gear after getting hot and rough shifting. Customer took to a trans shop, was told it needs a rebuild after a pan drop. Customer came to me as a referral, crying about $$$. After An (under performed)inspection, we in... |
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| 2000 Chevrolet Silverado 1500 5.3L auto transfer case VIN: 1GCEK19T2Y hello tech's i would appreciate any help with this one. i don't have any refrence material on a code c0323. |
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| 2002 Chevrolet Silverado 1500 4.3L MIL Lamp on VIN: 1GCEC14W72 this pick up had the code i described (p0174) at the begining. replaced o2 sensor bank 2 and i drove the vehicle for a while watching the o2 response. everything was ok. custumer came back next day with mil on and same code. i found a broken hose close to maf ... Trouble codes: P0174 (fuel trim system lean bank 2) |
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| 2002 Chevrolet Suburban 1500 LS 5.3L front diff fluid Hey people. Sorry for no vin and for the long post. I left the info back at the shop. This Suburban has blown a lot of fluid out of the vent tube for the front diff. It was in a few weeks ago for a small leak and was found to be front diff fluid coming out of ... |
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| 2003 Chevrolet Suburban 5.3L No Start VIN: 3GNEC166Z8 This is a salvage vehicle that was hit fairly light in the left front. Has been at local GM dealer for the last week where they replaced pcm, bcm, and tac module with new GM parts. The tech that worked on it is an old friend from high school and he is good so ... Trouble codes: P0315, P1638 |
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| 1995 GMC K1500 Suburban SLE 5.7L Transmission VIN: 1GKFK16K8S At present the vehicle exhibits a slip (tach will rev high)between the 1-2 shift only at cold ambient temperature (30-40F). It also exhibits a no power or flat line during an accelleration/moderate load (no down shift from O/D or 3rd. Scanner data & dash tach ... |
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| 1999 GMC Savana 2500 5.0L speedometer VIN: 1GTFG29M6X I searched the archives and found several speedo inop postings but nothing quite like this. Customer complaint is speedometer reads about twice what it should. (This has an electronic analog-type speedo.) Test drive confirmed complaint. The odometer was also a... |
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| 1988 Oldsmobile Cutlass Ciera Brougham 3.8L No Start, Poor Idle Quality, INTERMITTENT VIN: 2G3AM5130J No start occurs after vehicle has warmed up and then sits for 5 to 10 minutes minimum. The following is only after the warm up and shut down: Will sometimes start up and then idle roughly. Will sometimes start up, idle roughly and stall, then crank but not sta... |
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| 1997 Pontiac Grand Am SE 2.4L rear brakes VIN: 1G2NE52T9V came in for routine rear brake job all shoes worn down evenly, found rear e brake cables binding when attempting rear shoe adjustment, replaced cables, adjusted shoes with e brakelevers fully retracted. problem is self adjusting hand brake lever self adjusts c... |
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| 1997 Pontiac Bonneville SE 3.8L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on, Tach acts funny VIN: 1G2HX52K9V Okay here it goes. Car has an intermittemt check engine light with rough running erratic shifting and intermittent no start or stall. Have checked out this code numerous times in the past month on this car. About one month ago Finally acted up in front of me a... Trouble codes: P0336 (Loss of 18X signal at PCM) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1992 Cadillac DeVille 4.9L indicator lamps VIN: 1G6CD53B7N Customer has not returned so we may have corrected the problem (intermittent ground at pcm connector?) while performing circuit tests. Suggestions included checking both ends of battery ground cable for problems and using the AC computer to pull codes not avai... |
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| 1995 Cadillac Seville STS 4.6L programer VIN: 1G6KY5297S We recieved replies indicating possible incorrect orifice tube installation, flooded (oil) condensor, faulty programmer and a suggestion to check line temp through out the system to localize a fault area. However the vehicle has been away for over a month with... |
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| 2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR54R8Y I had four good replys which where for problems with mass air flow sensor and lean injecters on these and also they have 100/000 mile warranty recall on water pump and tensioners on these and these have a 4 year 50/000 mile warranty i passed the information on... Trouble codes: P0171, P0300, P0303. |
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| 1970 Chevrolet c10 350CID master cyl. VIN: GED1425L01 I tried to ajust the rod to see if that would work aand it did't I also tried aother master cyl. and proporation valve.thanks for all replied |
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| 1995 Chevrolet Blazer 4.3L No Start, Misfire VIN: 1GNDT13W85 I performened an injection system clean,replaced the fuel filter and ran cleaner through the injects.it been a month now and she says it runs great. thanks for every ones support Trouble codes: P0300. |
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| 2000 Chevrolet C3500 6.5L lack of power VIN: 1GBKC34FXY Ok; Like I said, I was posting for a co-worker. The fuel filter was replaced before any diagnostics were done. He didn't even drive the vehical before he replaced the filter. Kevin [...] told me in a reply that boost could be monitered on the scan tool. The ... Trouble codes: P0251 (Cam sensor problem). |
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| 1991 GMC C2500 Sierra SLE 5.7L heater core VIN: 1GTGC24K2M thank you to all that responded. the ideas were all good, but the problem ended up being related to the repair we had just performed. we had replaced the intake manifold gaskets for an external coolant leak. the gaskets we used had the wrong sized restrictor h... |
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| 1993 GMC K1500 Suburban SLE 5.7L heater VIN: 1GKFK16K3P Thanks for all of the replies. The vast majority said to check the quick disconnect fitting at the back of the intake manifold and that is exactly what was wrong. It was about 75% blocked. Once a new fitting was installed the heat returned to normal. |
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| 1997 GMC Yukon SL 5.7L Differential VIN: 3GKEK18R3V you wont believe this one after trying almost everything in the book we replaced the new front brake pads that had been installed at another shop and the noise went away. thanks to all who replied |
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| 1989 Oldsmobile Delta 88 Royale 3.8L Unknown VIN: 1G3HN54C2K We hope the noise is gone for good. We had replies that ranged from warped backing plates to cheap shoes. We removed the shoes and measured the plates for warpage and none was found. We replaced the shoes due to the fact that the pad was rivited on a little cr... |
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| 1999 Oldsmobile Alero GL 2.4L No Start VIN: IG3NL52TXX Thanks goes out to both Dan and Dave, the only responces I received. It turns out that I had a defective CMP sensor. But after replacing it a second time I now have a signal but still no-start. The inj.ign.mod.CMP,CKP,all have good waveforms the spark is prese... Trouble codes: P0463, P0705. |
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| 1992 Pontiac Trans Sport 3.8L Misfire VIN: 1GMDUO6LON Thanks I found the #6 plug was cracked and arcinging to ground when engine warmed up I guess the resistance was higher and the miss became even more intermittant thanks for all your help. |
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| 1993 Saturn SL2 1.9L idle jerk VIN: 1G8ZJ5577P Hello everyone and thanks for the input on this one. This one ended up being excessive crankshaft endplay. The customer is selling the vehicle and declined to do any repairs at this time. The amount of endplay was well in excess of what was allowed per specs... |
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