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Professional Automotive Repair Technical Discussions for February 18, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1981 Cadillac Fleetwood 6.0L charging system VIN: 1G6AB698B9 the car came to us with the complaint that it had problems starting, seemed like the electrical system would shut down but the motor still ran ok. on the first check the alternator output was 0 amps, we replaced the alternator. then retested it 60 amps max 12.... |
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| 1991 Chevrolet C1500 Cheyenne 5.7L Dash lights VIN: 2GCEC19K2M Hi Techs, I have a 91 Chevy 1500 pickup with inoperative dash lights. A new headlight and dimmer switch were installed with no fix. When the headlights are turned on, the turn signal indicators both come on and if I adjust the dimmer switch down to its lower p... |
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| 1993 Chevrolet Lumina Euro 3.1L MIL Lamp on, Multiple codes VIN: 2G1WN54T6P I'm getting wierd scan data readings on this car. Coolant temp is showing at 295f, manifold air temp at 309f, battery volts at 4.5 (tested charging system 13.9v, alternator is good). I'm pretty sure this is a bad ecm, A1-Cardone says the reman ecm needs to be ... Trouble codes: 24 (no vss), 34 (map circuit low), 42 (est circuit problem), 25 (mat too high), 55 (bad ecm adu error), 53 (also codes 45 36 62 61 and others intermittent) |
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| 1996 Chevrolet K1500 5.7L Lifter VIN: 1GCEK14R7T The #3 intake valve is noisy on this truck. The engine was rebuilt 6000 miles ago (not by us). We have pulled the valve cover and tried a dynamic adjustment of the lifter. You can loosen it up until you get some lash, and it starts to miss just about 1/4 turn ... |
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| 1996 Chevrolet K2500 Cheyenne 5.7L Mode Doors VIN: 1GCGK24R6T Good evening. Customer complaint of no air from vents, but all other modes work fine. Vehicle has A/C. This system has a mode door motor on left of heater housing, there is a linkage rod also connected to the defrost door. There are no rods going to the third ... |
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| 1998 Chevrolet Cavalier 2.2L oil pressure VIN: 1G1JC5243W Fellow Techs, I now have 2 Cavaliers, 2.2 liter, with oil pressure light at warm idle. I soaked oil sump with carburetor cleaner and then mineral spirits to remove possible sludge. Oil pressure has been verified to be 9lbs @ idle. Engines do not knock on co... |
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| 2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNCT18W9Y Replaced air pump (new from GM) and re-routed hose as per tsb on this code. and also replaced 30 amp maxi fuse located by battery. Customer drove about a week and code came back and fuse is blown again. Replaced fuse and now blown again, checked for water in a... Trouble codes: P0410 |
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| 2000 Chevrolet C3500 7.4L No Start VIN: 1GTGC34J2Y Hello all, Hope others have seen a repeated fuel pump failure like I got.Gm replaced the first fuel pump less than 50,000. This truck is a spare truck that belongs to a trucking company their techs replaced the fuel pump again at over 66,000 . They brought the... |
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| 2000 Chevrolet Impala 3.4L maintenance reminder VIN: 2GIWF55EOY Hi folks,got a 2000 Impala with a problem.About 1000 km after the last oil change the "change oil soon" indicator on the dash came back on.The customer did the reset procedure again and the message just comes back on.He claims now it comes on almost every driv... |
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| 2001 Chevrolet Express 3500 5.7L ping under load VIN: 1GCHG39R41 We have a carpet cleaning van with a truck mount cleaner that runs off the engine. It spends a lot of time at idle while the cleaning is being done. It started to ping on acceleration and the owner started putting premium fuel in it and that cured the ping for... |
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| 2002 Chevrolet Silverado 1500 5.3L converter VIN: 1GCEC14T52 I basically would like someone to describe for me in words that an idiot (me) could understand the procedure for blocking the pwm valve to eliminate the pwm control of the tcc. I believe this would fix the prob I am having, but I am unsure of what all is invol... |
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| 1992 Geo Tracker 1.6L fuel VIN: 2CNBE18UN6 hi all, need help with a problem that has me pulling out my hair. the tracker is a shop vehicle that always ran fine til the other day. was pulling out to do a delivery and the car stalled and wouldnt start back up. we checked the timing belt, ignition system... |
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| 2000 GMC Sierra 1500 SL 5.3L ABS module VIN: 1GTEK19TXY The ABS activates at low speeds, below 5 mph, when stopping. Happens a lot when just moving vehicle in line at a drive thru. ABS code C0222 was stored. R/F wheel speed sensor was replaced. Code C0222 did not return, but the ABS still activates when not needed.... |
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| 1996 Oldsmobile Cutlass Ciera 3.1L Misfire VIN: 1G3AJ55M3T customer brought car in for intake leak and misfire. as we all know 3100's are nortorious for intake leaks. before repairing intake leak we determined misfire which revealed cylinder #3. after inspecting plug wires we seen that #3 wire is arcing thru causing m... Trouble codes: P0301 |
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| 1997 Oldsmobile Aurora 4.0L Poor Idle Quality, Misfire VIN: 1G3GR62C4V Any Olds techs out their,This one came in for a Check engine light and rough idle, ran codes found random miss fire, 2,4,6,8 cylinders, checked plugs, plugs looked good and a bit lean in color, found # 6 wire arching to ground, we sold customer a set of spark ... |
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| 1976 Pontiac Firebird 6.6L Excessive Emissions, Poor Idle Quality, Hesitation, Stall Hey all you Pontiac techs, I am working on a friends Firebird. The vehicle doesnt have an emission label so I am not sure which engine is installed, can anyone help me identify between a 350 Pontiac and a 400. I did notice 6X on the head the carb # is [...]... |
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| 1991 Pontiac Firebird 3.1L Surge, Stall VIN: 1G2FS33TXM thanks in advance to all you guys/gals The vehicle came in barely running and would stall all the time, started testing the basics, good fuel pressure, steady engine vac, great spark from wires(3/4 in gap), checked basic timing with connector removed and vehic... |
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| 1994 Pontiac Grand Prix SE 3.1L Excessive Emissions VIN: 1G2WJ52MXR We have this vehicle that is giving us a little problem. While testing in the shop here, all systems seem to work just fine. But, when we try to get it smogged it will fail rich at the 25 mph test. During the test it will start out clean but will gradually beg... |
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| 1997 Pontiac Trans Sport 3.4L abs VIN: 1GMDX06E7V abs light comes on with code c1242 rear motor will not hold as soon as you put the van in drive, followed flow charts everything leads to motor pack, replaced motor pack cleared codes rechecked still comes on. thanks for any help!! |
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| 1998 Pontiac Grand Prix SE 3.8L Electronic VIN: 1W2WP52K7W Blower motor only works on high. Installed new resistor and all speeds work for about 5 minutes. Then resistor blows and only high speed works again. Within the last 6 months customer has replaced blower motor, switch, relay,and resistor. All parts have been r... |
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| 1998 Pontiac Sunfire 2.4L dash lites while vehical was driven by customer batt lite oil lite daytime running lite abs and air bag lite came on car died walmart installed battery customer than drove car for 2 days than all the lites on cluster started to come back on and flash no communication wit... |
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| 1998 Pontiac Trans Sport Montana 3.4L Misfire VIN: 1GMDU03E0W lean Misfire with negative fuel trim #s complaint is mis & jerk at high gear slight load. Ignition wires had resistance on at least 2 wires (rust on towers) sold customer a tune up of (Plugs ,wires air & fuel filter & motorvac injector cleaning) scoped wires &... |
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| 1995 Saturn SL2 1.9L engine VIN: 1G8ZK5279S Hello All This a tough one. Misfire on cylinder 3 all the time.3 After talking to a hotline we did a running compression test. The results Cranking all cylinders 125psi Cly#3 idle 90psi, snap 150psi. All other clyinders, idle 120psi, snap 175. Valve job did n... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1989 Buick Regal Custom 3.1L No Start, Stall, Misfire VIN: 2G4WB14T8K all information received was very good most sent me to after market module or coil packs after talking to custmer again found out car had engine replaced 2 years ago,wires for crank sensor were broken inside insulation after front bracket had smashed loom |
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| 1991 Buick Riviera Luxury 3.8L pass key VIN: 1G4EZ13C8L many thanks to all that responded to help me. when I ohm the key pallet at the decoder modual while turning the key I fidgered the unit was working ok, but the problem I couldnt get passed was if I grounded the black/yellow wire at the relay the engine would c... |
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| 1985 Cadillac Eldorado 4.1L Horn Hi Folks Thanks for the replies. Good suggestions ranging from junkyard to hot glue to offers of places to get one of these pieces. What I ended up doing was to solder a pigtail to the spring that transends the tilt area and feeding it through the broken pie... |
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| 1986 Chevrolet Astro 4.3L Unknown VIN: 1GBDM15Z8G Thanks for ALL the replies, I dropped the pan and found the pressure regulator in the pan. It appears I did not get the snap ring in the grove all the way, exactly how I still am not sure but I did. Once I got the pressure regulator back in the bore where it b... |
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| 1993 Chevrolet K1500 Suburban 5.7L all shifts Hello guys, I have some info that could help you with this problem in the future. First The switch was bad from the intermitant off and on situation and this was my problem. I did replace the switch and fixed the problem. Before the switch arrived at the end o... |
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| 1994 Chevrolet S10 2.2L Drive Range VIN: 1GCCS1442R I recieved 8 responses and 6 were exacly right. I removed the trans and tore down to check the forward sprag. Found it not holding. Ordered new sprag and reinstalled. Shifts great again. Thanks to Jerry [...],Wayne,and... |
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| 1996 Chevrolet Blazer 4.3L Fuel gauge VIN: 1GNDT13W9T First let me thank all of you for taking the time to read and respond to my post. Replies to my help question were either- thats the way they all are or, check to see it it has a bad anti-slosh module. 97 was the fist year the Blazer came with the module and f... |
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| 1996 Chevrolet Corsica 2.2L pings VIN: 1G1LD5543T got 4 more replies- Robert said to ask the customer about the history- he suggested it could have a bottom end problem- David said that if computer was receiving a knock signal and not retarding timing, it could have a PCM problem- Mark had a similar problem o... |
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| 1997 Chevrolet Express 3500 6.5L Poor Fuel Economy, low power VIN: 1GCHG35F8V The Bottom line fix of the problem of not being able to get the TDC to set was the manual is wrong. Our reading of the offset after installing the injection pump was -2.46. The spec is (-0.25 to -0.75). According to the manual it says to rotate the injection p... Trouble codes: P1214 (Injection pump timing offset), P0216 (Injection timing control system). |
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| 1997 Chevrolet Astro 4.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDM19W0V We appreciate all the help from the other members.But we are still waiting for customer to bring the vehicle back in for some more checks.Thanks to all who replied.Will make another post when vehicle is fixed. Trouble codes: P0300. |
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| 1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R8W Pulled opposite side valve cover and found broken spring on #8 exhaust valve. Many thanks for all the replies and especially William [...] who nailed it for me. Why this causes a misfire on 5 and 7 will take someone a lot smarter than me. T... Trouble codes: P0300 (Cylinder Misfire). |
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| 2000 Chevrolet Cavalier 2.2L steering column VIN: 1G1JC5243Y this car is fixed and the fix was to lower the rack and lube the top seal on the rack with small pick and put lube on the inside of the seal and the noise is gone thanks to all the noise is a very dry top seal butch |
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| 2001 Chevrolet Silverado 2500 HD LS 6.0L Oil Leak VIN: 1GCHK23U51 Thanks to Dennis [...]. It was the rear cover plate, and it does have a oil pressure passage that flows from both lifter gallies. The top of the rear cover plate sticks up higher than the block, so oil flows into the area around t... |
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| 1991 GMC V2500 Suburban 5.7L Poor Idle Quality, Hesitation, WILL NOT REV VIN: 1GKGV26K3M We received a total of 9 replies. All stretching from TPS, fuel pressure / volume, adequate grounds, MAP signal, timing chain / distributer problem and clogged exhaust. I must say these items didn't turn out to be the problem, but they keep you on your basics;... Trouble codes: 43 (Electronic Spark Control Circuit). |
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| 1999 Oldsmobile 88 Royale 3.8L Surge, Stall VIN: 1G3HN52K9X Thanks For The help. Daniel [...] Quebec Responded Quickly Last Night. He Said Look at LTFT %. IF It Is + It Is Running Lean And If It Is - It Is Running Rich. Just Got In A Hurry And Overlooked This. Pluged The Fuel Regulator While Car Was Cold This Morning An... |
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| 2000 Oldsmobile Intrigue GX 3.5L Engine VIN: 1G3WH52H6Y We tried all the advice we recieved, we did the pcm tap test and it had no affect, we had already cleaned the injectors and did an induction service, we had also unhooked the mass air flow and had no affect, watched fuel pressure and the fuel pressure would dr... |
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