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Professional Automotive Repair Technical Discussions for March 10, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1994 Cadillac Eldorado 4.6L Engine VIN: 1G6EL12Y4R Hey Guys, I got this Caddy in today making a horrible noise upon crankup and comes and goes from there it sounds like it is coming from the timing chain area in front of the engine. The customer stated that it made this same noise about a week ago and the quit... |
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| 1989 Chevrolet R2500 Suburban Scottsdale 7.4L high idle VIN: 1GNGR26N0K Engine rpm is 750 to 775 in gear, iac showes 80, when you put it back in park rpm goes to 1500 and stays there, iac still showes 80. If you kill engine and restart it idle is about 800 to 850 and iac showes 10 to 15. tps checks good, p/n switch shows good, all... |
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| 1997 Chevrolet Astro 4.3L engine VIN: 1GNDM19WXV I would like to hear from other shops, mechanic's that have repaired intake leaks, head gaskets on the 4.3 V-6. I had a oil sample test, done and found high amounts of iron, potassium, magnesium. Have you seen complete engine failure. I.E. Bearing damage, afte... |
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| 1997 Chevrolet C2500 Cheyenne 5.7L No Start, Cuts out VIN: 1GCFC29R2V the truck was towed in dead,no spark,no fuel pressure,scan tool won't work.truck had blown fuse ecm-b (20amp)replaced fuse ran fine for 1 min. blew fuse again. replace fuel pump (harness was burnt near fuel pump)sending unit and replace relay.the truck still b... |
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| 1997 Chevrolet Malibu 2.4L Electronic VIN: 1G1ND52T8V Hello fellow techs, I have a vehicle that does not change gears. I notice that this happens after a few minutes of driving. This was customer original complaint to previous shop, they overhauled transmission...I getting a couple of DTC (P0717 and P0758). I wou... |
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| 1998 Chevrolet C3500 Cheyenne 5.7L flat on takeoff VIN: 4KL8481R7W This is a Isuzu NPR truck with a chevy 5.7 vortec engine and 4L80E trans. Customers vehicle, replaced engine and all injectors due to high mileage low compression. Vehicle returned two weeks later with this problem, flat on take off reguardless of pedal positi... |
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| 1999 Chevrolet Silverado 1500 5.3L No Start, Poor Idle Quality VIN: 2GCEK19T1X hello chevy techs, I've got a 99' K1500 w/ a 5.3L engine. Customer complains of extended cranking time, only when cold, replaced fuel pump, same problem, after about an hour of sitting with the engine off, fuel pressure drops to about 20lbs, but immediately up... |
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| 2000 Chevrolet Impala 3.4L Stall VIN: 2G1WF52E5Y has anyone been reflashing this car re no p/s at lo spds using aftermarket vetronix equipment is it working? is it worthwhile buying or is it still adealer only item ? |
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| 2000 Chevrolet Prizm 1.8L Excessive Emissions, Poor Fuel Economy VIN: 1Y1SK5281Y vechile is failing the smog program, after tune up and manually check the emmisions it has been found that the system goes into open loop just off idle and the o2 sensor goes to .054 mv, no codes stored in the system? |
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| 2001 Chevrolet Silverado 2500 HD 8.1L MIL Lamp on VIN: 1GCHK29G61 Okay guys, we're a FORD dealer here w/ this Chevy. I retrieved the P0342, but I have yet to duplicate the problems (intermittent hard start, misfire) Does anyone have access to the TSB pertaining to this code they can send me ?? Any help would be appreciated ?... Trouble codes: P0342 (cmp sensor ckt signal low) |
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| 1995 Geo Prizm LSi 1.8L No Start VIN: 1Y1SK5287S Hey guys, this geo came in on the hook yesterday. The customer parked car the day before and the next day no start. This car has no spark or injector pulse. Alldata is no help. I have looked at grounds and fuses. I really dont know where to start on this one. ... |
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| 1989 GMC C2500 Sierra 5.7L ride control VIN: 1GCG124KOK The original complaint was that the truck was wondering going down he road. Most of the steering system was either bad (out of specs.) or loose. Starting with tie rods, inner, outer, and an allignment. This took care of some of his wondering issues. The steeri... |
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| 1999 Oldsmobile Alero GLS 3.4L No Start VIN: 1G3NF12E1X I need help with this problem child.This car will not have injector pulse or spark from all packs intermitantly after sitting 12 hours at under 3o degrees.Car has never had a code.This car may go 1 or 2 weeks without a problem.Everytime it acts up I start trac... |
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| 1992 Pontiac Grand Prix LE 3.1L Poor Idle Quality, Surge, MIL Lamp on VIN: 1G2WH54T7N test drive 50 60 mph on decel light on rough idel at stop than evens out o2 working Trouble codes: 32 (egr problem) |
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| 1999 Pontiac Grand Prix GT 3.8L brake pedal VIN: 1G2WP52K2X Hello group. Have a strange one in the shop. We are working on a 1999 Pontiac Grand Prix with abs and traction control. We have a fading brake pedal . We verified master cylinder is not the problem, checked all calipers, rotors, pads, etc. No air in system. No... |
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| 1999 Pontiac Grand Prix GT 3.8L low oil level light VIN: 1G2WP52KXX Help please .This a friend's car and they are annoying me with this low oil light . It only comes on first thing in the morning.Yes the oil level is ok ,but the light still comes on . According to the wiring diagram it goes to the light the dash . Thanks for y... |
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| 2002 Pontiac Montana 3.4L Misfire VIN: 1GMDV03E02 This vehicle came in with a misfire on #1 cylinder. We replaced the spark plugs & plug wires and the vehicle ran with no misfire. The problem now is that at about 70 - 80 km/hr when the transmission is in overdrive and accelerating slightly on an incline the e... |
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| 1998 Saturn SL2 1.9L High ecm voltage VIN: 1G8ZK5270W I was hoping one of you Saturn Techs may have run into this before. Car came in with a no start, found a bad conection behind the under dash fuse panel. Car starts and runs ok. Problem #one solved. When driven, within the first 100 feet, the trans jumps into w... Trouble codes: P0560, P0563 |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1994 Buick Park Avenue Ultra 3.8L Poor Idle Quality VIN: 1G4CU5212R Thanks all for the help. I received 14 replies, and all had good ideas. Unfortunatly, none hit the mark. It turned out that the wrong harmonic balancer was on the engine. By a fluke, had similar car in the shop for a T/C. Saw a minor(or what I thought was) dif... |
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| 1994 Cadillac Seville SLS 4.6L Cuts out, Stall VIN: 1G6KS52Y6R Thank you to techs that responded to my request. Sorry it took me a few days to report fix. repaired bad connection at fuel pump wire harness (main connector outside of tank) solved erratic f/pump voltage,but car still would die / cut-out extremely suddenly. F... |
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| 1995 Cadillac DeVille 4.9L Excessive Emissions VIN: 1G6KD52B5S thanks for the replies--the customer balked at the expense of injectors which was the leading recomdation and will sell the car--thanks again |
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| 1990 Chevrolet Corsica LT 2.2L Stall VIN: 1G1LT54G8L thanks everyone for usefull information. i send car to trans shop to diagnoise transmission. thank again. |
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| 1991 Chevrolet Camaro RS 5.0L Poor Idle Quality VIN: 1G1FP33E7M I'll have to close this with a summary. Other than checking for vacuum leaks I couldn't justify spending much more time on this engine. A couple replies reinforced my theory that the low compression on four cylinders and the obvious chain slop was most likely ... |
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| 1991 Chevrolet Cavalier RS 2.2L Cuts out VIN: 1G1JC11G7L Although I'm still not sure why my scanner did not work, i tried using an auto xray scanner that a freind had offered and was able to get a data stream from the vehicle. After that it was all down hill . I found a code 42 est and determined that the ignition m... Trouble codes: 255 (Uknown fault). |
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| 1993 Chevrolet Astro CL 4.3L speedometer VIN: 1GNEL19W5P Hey I want to thank all you that responded to this post. We took the advice and checked out the speed sensor signal and found battery voltage on the wires. We knew that it was supposed to be a AC signal so we clipped the wires and ran new wires from the speed ... |
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| 1998 Chevrolet Tahoe LS 5.7L Battery VIN: 1GNEK13R8W Thanks to everyone. Whoever mentioned a vanity mirror light hit the nail on the head. Thanks again to everyone. |
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| 1999 Chevrolet S10 LS 4.3L Surge VIN: 1GCCS19W5X first i want to thank all tech's for your time and help well i change EGR valve again come to find out the first one was defect from dealer installed new one every things geat she runs like a top agian thanks again Rui [...] |
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| 1999 Chevrolet C1500 Suburban 5.7L Cuts out VIN: 3GNEC16R8X Wayne from Kentucky hit this one rite on. The crank shaft sensor wires harness had come out of the retainer and fell onto the right exhaust manifold. Just barely burnt through that only intermittently would short out and cause the miss. Gregory [...] had some... |
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| 2002 Chevrolet Trailblazer LS 4.2L Cooling Systems VIN: 1GNDT13S02 hi every body from iatn member you guys are the best ,truck is fix replace the clutch fan like most you guys said thanks to david,christopher,tom,andrew,takuro . and have a nice days. |
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| 2003 Chevrolet Silverado 2500 6.0L Poor Idle Quality VIN: 1GCHK29U03 2 out of 4 replies were bang on. I cleaned the throttle body and it works perfect. Thanks alot guys. I don't know how this affected the voltage readings at the APP sensor because the customer was anxious to go. Vive la iATN! |
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| 1993 GMC C1500 Suburban 5.7L Drive Belt VIN: 1GKEC16K3P Richard from Arizona said, 'I have seen Chevy's throw belts because of a power steering pump pulley not fully installed'. I took a look at the power steering pump pulley even though it is on the opposite side of the idler pulley. The pump was fairly new lookin... |
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| 1993 GMC C3500 Sierra SLE 7.4L rear brakes VIN: 1GTHC33N7P I changed the rear shoes to original GM linings, as the Brand new carquest linings were not up to par. the GM linings helped out a little, but I think I will end up bypassing the whole ABS unit, like many of you have recomended. THis is my boss's truck and the... |
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| 1992 Oldsmobile 88 Royale LS 3.8L Misfire VIN: 1G3HY53L1N The fix is in, it was a slightly loose crankshaft sensor, it was just loose enough to move slightly in the mounting bracket. I have seen loose sensors before and never had any of the double spark conditions that this one had. The signal still looked the same... |
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| 1996 Pontiac Firebird 3.8L keyless entry VIN: 2G2FS22K3T Took the remotes apart. Removed the rubber button pad from the circuit board and cleaned contacts. Remotes now work like new. Thanks to all who responded! |
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