GMC Answered Questions & Fixed Issues

Have you had the vehicle plugged into an OBD2 scanner to look for trouble codes? This will give more clues as to what this issue could be. If you have to pay for this ask at 4 or 5 places as prices can be VERY different. Simply "throwing" parts at the problem is a Very expensive way to work. Comment below with the codes and I'll see if I can help you more.

there were 3 systems offered day 1 new. the service manual covers all 3. i'll pop for base system only see schemo here. https://imgur.com/a/ZFu4TJu

To test the ignition module on a 1995 GMC Sierra 5.7, you can follow these steps: 1. Safety Precautions: Ensure the vehicle is in park or neutral with the parking brake engaged. Also, disconnect the negative terminal of the battery to prevent any accidental electrical shock. 2. Locate the Ignition Module: The ignition module is typically mounted on the distributor or in close proximity to it. It is a small, rectangular component with electrical connectors and heat sinks. 3. Inspect the Wiring and Connections: Examine the wiring harness and connectors leading to the ignition module. Look for any signs of damage, corrosion, or loose connections. Ensure all connections are secure and in good condition. 4. Test the Ignition Coil: The ignition module works in conjunction with the ignition coil. You can test the coil by connecting a spark tester to one of the spark plug wires and grounding the tester. Have an assistant crank the engine while you observe if a spark is present. If there is no spark, it may indicate a faulty ignition coil or module. 5. Use a Multimeter: If the ignition coil tests fine, you can use a digital multimeter to test the ignition module. Set the multimeter to the resistance (ohms) setting. Disconnect the electrical connectors from the ignition module and measure the resistance between the appropriate terminals, as specified in the vehicle's service manual. Compare the readings to the manufacturer's specifications. If the resistance values are significantly different from the specified range, the ignition module may be faulty. 6. Consult a Service Manual: It's essential to refer to a detailed service manual specific to your GMC Sierra 5.7 for accurate testing procedures and specifications. The manual will provide step-by-step instructions and values for testing the ignition module. If you are unfamiliar or uncomfortable with performing these tests yourself, it is recommended to seek assistance from a qualified automotive technician or a GMC dealership. They will have the expertise and specialized equipment to diagnose and repair the ignition system accurately. This might help

If the right front signal light of your 2010 GMC Sierra stays on even when the truck is shut off, it could be due to a few possible reasons: 1. Stuck Relay: There might be a malfunctioning relay in the turn signal circuit that is causing the right front signal light to remain illuminated. A stuck relay can keep the circuit closed even when the vehicle is turned off. In this case, you may need to have the relay replaced or repaired. 2. Faulty Wiring: It's possible that there is a wiring issue in the turn signal circuit, causing a constant power supply to the right front signal light. This could be due to a short circuit or a damaged wire. Inspecting the wiring harness and connections for any signs of damage or loose connections would be necessary. If a faulty wire is found, it may need to be repaired or replaced. 3. Malfunctioning Switch: The turn signal switch itself could be defective or stuck in the "on" position. This can cause the right front signal light to remain illuminated regardless of the vehicle's status. Replacing the turn signal switch might be necessary if it is determined to be the cause of the issue. To pinpoint the exact cause and resolve the problem, it is recommended to have a qualified mechanic or an automotive electrician inspect your GMC Sierra. They will have the expertise and necessary tools to diagnose the issue accurately and carry out the required repairs.

easy as eating cherry pie. wrong fuse there, 1amp is dead wrong, only oem size is allowed the Reverse feed is shorted. only where is the conundrum.? sure rear but wear.) trailer hitch hacks top the cause. shorted lamps sockets rear shorted lamps did know they short easy when abused (twisted, by noobs too hard) or LED upgrades using cheap C-H-I-N-A upgrades, that love to short at the drop of a hat, remove the upgrade that was really a down grade. BOOM collision damage not fully cured, (endless) some on hacked up the PRNDL switch and the R pin is shorted.

If your vehicle's air conditioning system intermittently switches from blowing cold air to hot air, there could be a few possible causes for this issue. Here are some potential reasons: 1. Low refrigerant levels: Insufficient refrigerant can lead to inconsistent cooling performance. When the refrigerant level drops, the system may blow cold air initially but eventually switch to blowing hot air. This could be due to a refrigerant leak or a problem with the AC system's components. A professional AC service technician can check the refrigerant levels and locate any potential leaks. 2. Faulty blend door actuator: The blend door actuator is responsible for directing airflow through different vents. If the blend door actuator malfunctions or gets stuck, it may cause uneven airflow distribution, resulting in cold air on one side and hot air on the other. Replacing the faulty actuator should resolve the issue. 3. Control module or sensor malfunction: The AC system relies on various sensors and control modules to regulate temperature and airflow. If any of these components malfunction, it can cause erratic cooling behavior. A diagnostic scan by a qualified technician can identify any faulty sensors or control modules that need to be repaired or replaced. 4. Electrical or wiring issue: In some cases, electrical or wiring problems can cause intermittent AC issues. Loose connections, damaged wires, or faulty relays can disrupt the proper functioning of the AC system, leading to inconsistent cooling performance. A thorough inspection of the electrical system by a professional is necessary to identify and resolve any wiring issues. Given the complexity of diagnosing and repairing automotive AC systems, it is recommended to take your vehicle to a qualified mechanic or AC specialist. They have the necessary tools, knowledge, and experience to diagnose the specific issue and perform the required repairs to restore consistent cooling performance in your truck.

We're is the fuse box for a 1993 safari van

where did you get that code ----ford and bmw have it not gm

no car told. year 2000- but no truck told. at all C7500? what, over 20+ cars that year GMC actual the answer always simple buy the service manual and read that. you posted ANON so I cannot see all your posts to glean model name, my guess Transfer case motor drive. device. fuse./ the is no answer 20+ cars ever.

2992 , ARE YOU CAPTAIN KIRK, TRAVELING 969 YEARS IN TO THE FUTURE OR MICHEAL J. FOX? CAN I WATCH? LOL !!!!!!!!!!! 2002 SURE. xl 1500 OR XL 2500 WHICH IS IT? engine starts and drives? sure as RPM guage works. ALL FUSES GOOD IN ALL BOXES ????????? YOU CAN NOT DO THAT. THE CLUSTER IS NOT PLUG AND PLAY AT ALL IN THE USA THE CLUSTER AND PCM ARE MARRIED FOR ODOMETER LAWS. but oddly not this truck , IPC is master of ODOM it seems. MY GUESS IS BOUGHT THE TRUCK DEAD LIKE THIS. HOW KNOWS WHAT OTHERS DID, ENDLESS AND BAD. ABS NEEDS ITS OWN SCAN WITH A REAL ABS SCAN TOO,. ABS FUSE BLOWN 60AMPS IP BOX AIR BAG FUSE BLOWN. 15AMP THERE IS NO OTHER WAY, IF PCM WILL NOT SHOW ABS STATUS. SAME WITH SRS BAGS IT MUST BE SRS SCANNED. IS ODOMETER IS DEAD ? DO NOT IGNORE SHORTED 02 SENSORS, THEY LOVE TO. AND IS SUPER BAD FOR POWER BUS BUT There are 2x, 02 fuses. the cluster uses RADIO FUse 15amp under hold box cigar fuse not blow or scan port fails at pin 16.DLC obd2. this truck is complex ,lost of things to short out fuses are FIRST all of them checked first, a 20cent fix each one found. saving endless labor. barking up wrong trees, (pun intended) Cluster facts. real name GM IPC 3 fuses.IN IP box AND 1 IN HOOD BOX. cruise,IGN0, IGN1 all good and radio fuse (hood) good if radio blows the info display goes dead."MESSAGES" G103 ground to IPC good the cluster is 99% pure digital and runs off serial data from pcm and more, the 1% are some simple lamps Turn sigs CEL is PCM controlled 100 $% digital Odometer and trip, display no why that works with IPC swaps hints from the web Mileage in full size trucks is kept only in the IPC, instrument panel cluster. The Colorado and Canyon are kept in the BCM.. the rebuilder said VIN/mileage required to order! SO IT SEEMS THE IPC IS MASTER OF ODOM AND TELLS THE PCM MILES BUT VIN CODES CAN BE PROBLEM STORED AND NOT EQUAL.

Ck here..... https://www.justanswer.com/gm/7vcpx-06-gmc-envoy-4-2-4x4-has-forward-no-reverse-goes-forward.html

Is there a connector for trailer lights on the back of the truck? If so, that is a common spot for issues.

remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation. Remove the brake caliper. Refer to Rear Brake Caliper Replacement. Remove the rear wheel speed sensor. Refer to Rear Wheel Speed Sensor Replacement. Remove the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement (8.0/8.6 Inch Axle) ' Rear Axle Housing Cover and Gasket Replacement (9.5 Inch Axle). Remove the pinion shaft locking bolt On axles without a locking differential, remove the pinion shaft. (learn what locker means and does) or read the RPO list on car. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.

1. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the C-lock?(1) until the C-lock aligns with the thrust block?(2).
2. Push the flange of the axle shaft?(1) toward the differential.

remove the C-lock from the button end of the axle shaft. read the manual first. if he bearing is seized up and they can swell up and be tight the slide hammer is the only cure here. and is always best to use. (after all pre steps on 3 different axle types) not told by you. 1 get the RPO first from GM 2; then read the manual. 3: then act. easy as 1,2,3 ,not guessing and doing damage.

is this a preSALES question or post installed. or what? or post intall and lost a FOB? tell the full story here, we can not guess. what is this Python thing (a aftermarket remote start kit) ask GM this? most cars this new the manual states that 3rd party remote starts will not work ask GM first. some sellers flat out lie to get money and know many customers will not return the unit or say there is no warranty many states now this down grade is *******. the makers online help is useless (faq) but is because of extreme complexity here(vast cars and years and models) the answer is call them on a phone or ask the authorized installer Python. all modern cars have and IMMO and this IMMO PASSKEY will not like any kind if bogus remote starts. the modern car used very complex rolling codes that are kept secret, even by law now. ask them? https://pythoncarsecurity.com/Products/ one of the most complex topics on any modern car 10x that with IMMO

all that must be repaired is this car fitted out with IMMO and passive electronic keys? got insurance, all them tell them car was vandilized may INS CO> have special rules on that. unlike collision. so call them if if yes, tow car to shop get it fixed on them. we can not see what this car has there, lots of options!! the GM car has a RPO list based off VIN full # (all options listed) and will list IMMO PASSKEY, if there. and is the first thing to do on all cars. made 2decades, or go mad and broke fast. first things first and fuses good too. and scan the pCM for IMMO errors, etc. for sure the key switch was wrecked by them or more. more happens,

OK NOW A SYMPTOM. CRANKS BUT WILL NOT STARTkey is bad,IMMO lamp glowing telling you the key is bad.do you have 5 pound key chain that wrecks all car locks? my guess no but the battery in truck is low underhood, 12vdc,car has Throttle Actuator Control throttle by wire and will not start or only idles or limits speed to 20mph if it fails TBW, TBW (TAC) has many failure modes and one is not to drive over people if Throttle pots (x4 )say its at WOTwide open throttle. or the silly motor fail and is jammed i the TB throttle body.there are 50 causes of no starts.and up to 20 tests to find it using real tools.guessing 49 times is costly.I never pull any pump on a whim and take bath in fuel the pump tests are easy on car ask.the PCM cuts fuel for many reasons, 6 at least.IMMO tops the list.fuses blownlean the PCM now,. do not fail to scan any modern car or go broke fast or have huge down times and piles of wasted labor or worse add wrong or bad parts or not calibrating them first. per service manual...SCAN ITI CRANK IT AND AT STALL i SCAN IT. NOW, KEY STILL ON AND THE DTC'SROLL OUT , MOST THE TIME.

are you confused,????? its not a GM./ Vehicle Type: PASSENGER CAR Model Year: 2008 Make: TOYOTA Model: Corolla Body Class: Sedan/Saloon engine 1.8 liter, 1ZZ-FE 2T1br32 2= country 2= canada ,1, 4, 5 United States T = toyota 1= brand of toy B= sedan, four doors, 4×2 R = R-1ZZ- FE (1.8 liters, 16 cl., Petrol, 129 hp) family EFI (DOHC, VVT-i) I JUST DID BY HAND 5 FIRST DIGITS FOR YOU THE SERVICE MANUAL SHOWS THIS DECODE FULLY. BIT BY BIT. OR HERE https://www.youcanic.com/toyota-vin-decoder/ position 12 " 17 identifies the serial number of the car.

the lost now glove box user guide on all cars cover all that. so if lost get it google finds them all so do so some are even free. if you googled. 1993 is paper only guide. one is under hood one is under dash see page 306, here, the photos are crude scans of 30 year old old booklet so be happy some poor dude scanned it. it is all there and can be downloaded free 100% free. and best place of all. https://www.manualslib.com/manual/231732/Gmc-1993-Safari.html?page=306#manual USA car one fuse box is just to the left of steering column at toes has huge black cover over it ,day1 new car. that simply pulls off and the fuse panels is there. under dash left USA LHD CARS

what is a hub? is this a brake hub? what? the service manual covers all that, buy one,. rent it online. job job told at all brakes , wheel bearing hubs bad. or emergency brake failures. axle seals leaks, can we have clue? what's up doc, what is the problem so we can read he pages in the manual to you. so I will now guess 1 job of many bad caliper day, Rf&R rear

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
3. Remove the brake hose fitting bolt?(1).
4. Remove the brake hose fitting?(2)?from the brake caliper.
5. Remove and discard the brake hose fitting gaskets?(3).
6. Cap the brake hose fitting to prevent brake fluid loss and contamination.
7. Hold the brake caliper guide pin stationary and remove the brake caliper guide pin bolts?(1).
8. Remove the brake caliper.

now the rotor

1. Remove the brake rotor bolt?(1)?and the brake rotor.
2. If the brake rotor is difficult to remove, remove the park brake shoe adjuster access plug on the face of the brake rotor to gain access to the park brake adjuster and loosen the park brake shoe adjuster.

just hang the caliper on bailing wire or bungees. not pull hoses !!!! see magic screw 1, my guess you missed that trick.