Q: 2000 GMC Sierra 1500 4x4 Need fluid recomendations

Hi there. If your car has overheated, it may have caused your head gasket to warp. This warpage allows coolant to enter combustion chambers causing your vehicle to not efficiently cool. An external leak is not necessary for this blown...

If you have teeth on the flywheel missing it is possible that if the engine stops at just the right spot the starter will not be able to engage the flywheel and turn it. In order to replace the flywheel...

It may be possible the misfire is from coolant leaking onto the plug wires. You will need to fix the coolant leaks (https://www.yourmechanic.com/services/coolant-is-leaking-inspection) first and at the same time make sure the camshaft (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) and crankshaft position sensors (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) did...

Hello. It sounds like there may be a problem with the piston or the valves in cylinder 5. Loose rod bearings to the piston can cause a knocking noise and/or a misfire condition (https://www.yourmechanic.com/services/engine-is-misfiring-inspection). A worn out piston can also...

Hi there. The hesitation would be a communication error with the transmission. Also, if the transmission is low on fluid there could be a hesitation when accelerating. Check the transmission fluid level and make sure that it is full. Check...

Hello There, I think you are on the right track in starting with checking the fuel pump for power at the pump and the relay. I would suggest next checking to be sure the injectors (https://www.yourmechanic.com/services/fuel-injector-replacement) have power going to...

Hi there - the next level of diagnostics are going to be required - specifically the ABS system. (Top level OBD II codes aren't enough here) I suspect you have a wheel speed sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-wheel-speed-sensor) that is dirty or malfunctioning....

There are several possible reasons for a vehicle to crank and not start (https://www.yourmechanic.com/services/car-is-not-starting-inspection). A bad fuel pump, clogged fuel filter, faulty injectors, bad ecu, failed ignition coil, or a malfunctioning sensor. It will first be necessary to figure out...

Hi there. Generally speaking, when a car will start but stalls randomly it will be due to either an electrical short in the ignition system or a fuel restriction problem, misfiring fuel injectors or other faulty components. Since there are...