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K2500

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Question
reverse went out
Hello, the issue needs to be addressed, the vehicle will become inoperable in all gear ranges. The automatic transmission has 3 systems; electronic, hydraulic, and mechanical. What describe could be an internal mechanical failure with transmission. The electrical system...
Question
Idles great, but won't accelerate
This may be caused by any number of things, but may be most commonly associated with a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to...
Question
Electrical system not charging
You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage...
Question
Transmission problems?
If you feel that you are experiencing transmission issues, I would recommend having your truck inspected by a certified professional with experience in transmission diagnosis. If you continue to drive the truck with these issues, they can become worse and...
Question
How can I find the correct chassis wiring harness for my truck?
The harnesses are referred to in GM parts catalogs as "body wiring" and "rear lamp wiring". However, the correct wiring harness for your vehicle can only be found via a VIN number search in the catalog. It can't be searched...
Question
I need to know which body wiring harness goes to my truck- VIN lookup
My best recommendation would be to contact your local dealership. If you give them your year, make, model, vin, and a description of the wiring harness that you need, they should be able to give you some information in regards...
Question
heater works for about 20 mins then starts to blow cold air
Check for low coolant level and, if low, there is a possibility of air trapped in the system. Check for collapsed (or soft) hoses. Check your engine operating temperature to see if it is in the normal range of 195...
Question
Trans problem
Claimed by Kevin Gainer
Question
Low brake pedal and anti-lock brakes are not kicking in.
The brake pedal is working to stop the vehicle, but there may be air in the controller unit causing the ABS brakes to not function. I recommend bleeding the brake system from the farthest location from the master cylinder to...
Question
Injectors
Hi There, Yes, you are correct in that there is what is known as the "spider" which looks obviously a bit like a spider. This is the fuel meter body that has several lines coming from it with the fuel...
Question
Normal operating voltage?
Most vehicles require at least 13 volts to operate properly. Ideal voltage is 13.8 - 14.4 volts. 14.5 volts is completely acceptable and should cause no issues.
Question
I changed the break light switch and now I can not get the truck out of park
Hello, thank you for writing in. The vehicle may be having issues the with ABS system. Considering the timing with the brake light switch, you will want to verify that installation and make sure it is clean, dry, and tight....
Question
Crank but no start
Hi there. First off, any mechanic that say's one part is the issue without inspecting the vehicle isn't a very good mechanic. This is why we really can't tell you what to repair without completing a car is hard to...
Question
Getting fuel, getting spark, and won't start.
Check the ignition timing on the distributor and see if the timing is off. If the timing is good, then the accelerator pump in the carburetor or the fuel injectors are not working properly (if your vehicle has TBI injection)....
Question
High speed acceleration issue
Yes, you do have an old truck, but that doesn't mean it can't run well. If you noticed this problem about the time you replaced the catalyst, it could be that the replacement catalyst is not large enough to breathe...
Question
I have a 94 gmc 350 that won't run , the temperature gage is way over 260 and the check gage light is on
Hi there. If the engine temperature is running high, it can cause several problems with electrical harnesses, connectors, sensors and other vehicle systems that impact the ability to run. In most cases, diagnosing the root source of the high temperature...
Question
Damage to rear Differential? 1994 Chevrolet K2500
Hello - while you are correct that this is not an ideal scenario, I doubt that packing the bearings with a lithium grease like "Red & Tacky" is a long-term issue. Not sure where R&T gets a bad rap as...
Question
Wiring diagnosis
Hi Kevin. Unfortunately, we are unable to attach images or files to this platform, so we really can't help here. You might want to purchase a service and repair manual for your K2500 as this will provide a detailed wire...
Question
My shifter is stuck in park and when I go to turn overy the engine A loud grinding noise is made
The usual cause of grinding during starting is a starter and/or flywheel fault although there are other less common possibilities that would be considered as well. If the shifter is stuck, if your vehicle is not equipped with any shift...
Question
Loud metallic clunk and stops cranking when trying to start after removing and reinstalling upper intake manifold,
Hi there. Check the fuel injectors and make sure that they are hooked up properly. A leaking fuel injector will cause fuel to flood the cylinder and hydro lock the piston making the engine stop cranking. Also, check for anything...

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