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G2500

If manipulating the original switch caused the lights to turn on and off, that would suggest that the rest of the headlight circuit is OK. If you replaced the switch and yet you have the same symptom that you had...

Hi there. Typically we don't offer advice on aftermarket component upgrades. In regards to whether the voltage regulator is located inside the new alternator, that depends on the unit. This one for example (,https://www.dbelectrical.com/products/alternator-high-output-220-amp-5-7l-gmc-truck-89-90-91-92-suburban.html) has it installed inside and does...

Hello. You will only get power to the crank fuse when you have the ignition switch in the crank position. You need to check to see if you are getting spark from the coil. If not, then you most likely...

The question would need to be more specific. When changing out a motor with a used motor is hard enough to get the same year engine to work correct. You want to change out to use a more modern motor...

Hello. You will need to find out if your engine is misfiring due to an ignition part like plug wires (https://www.yourmechanic.com/services/ignition-cable-spark-plug-wires-replacement), plugs (https://www.yourmechanic.com/services/spark-plugs-replacement), or distributor parts like a cap and rotor (https://www.yourmechanic.com/services/distributor-rotor-and-cap-replacement) or the module. If all the tune-up maintenance...