20 Most Recent 2003 Chevrolet Silverado 3500 Questions & Answers

You have a bad bulb. Likely a front bulb. Check all bulbs. One has to be bad.

if you are driving in 4H on hard surfaces and just flip the switch to 2H still on the hard surfaces it will react exactly as you describe when in 4H as there is no internal diff action in the transfer case , a condition known as torque wind up occurs and places heavy loads on the drive line components thereby locking the gear teeth and that will not allow the separation on selecting 2W drive if at some point one wheel looses traction for a split section, that torque wind up is reduced and the pressure on the actuator slams the selector out of engagement 4H should only be used in slippery conditions , mud, dirt ,snow,ice, grass etc where the wheels loose traction and allow that wind up to dissipate if you continue to drive on hard surfaces in 4 H then transmission failure will occur earlier than can be expected

No! If the crank sensor fails the engine will not start. The ignition module must receive a crank sensor signal for the engine to run.

The CPS is typically located behind the harmonic balancer on the crankshaft. It may or may not be hidden behind the timing belt/chain cover on the front of the engine.

Your owners manual will tell you this. It's in the underhood fuse block.

You must have an electronic set up. But if you have cable, this will work. Cable , remove the cable and push the arm back 2 spaces/clicks for 4 high. all the way back for 4 low. With electronic. Remove the bolts from the rear part of the drive shaft. Push it a side. remove the bolts holding the motor, remove the motor.. Use pliers to move the rod back 2 spaces for 4 high. 3 for 4 low. reinstall the drive shaft. Beware though. With electronic, the more you do this, you will eventually have to replace that rod..Rebuild it.

it should be on the intake manifold.

Unless this truck was designed different from all the rest? It should be has simple as pulling off the tire and tapping around the back edge of the drum and it should pop off. Be sure emergency break is off, because that will spread the shoes making the drum wedged on. You did say drum, correct? Because if you have rear disc breaks? Pull tire and remove housing (two bolts) holding the break pads. You may have to stick a pry bar between the rotor & caliper to depress the caliper piston/s. A 350 truck probably has 2-pistons on the caliper. Also. get a couple finger visegrips to depress the pistons all the way down before trying to reinstall the break-pads. This way you don't have to bleed the breaks when you are done. just remember to pump them up a few times before you take off to drive. they will come right back up and should work perfectly.

If it a cracked cap it's always going to run badly. First put some gas treatment to remove water from gas. if it still runs bad inspect the cap for cracks. even I small crack will be hard to see. Mark the wire location B4 pulling off the cap. in a dark place put a light in cap and block around the bottom to inspect sides for crack. I would try gas/water separator first.

You have a bad lock cylinder. This is pretty common on most GM cars. You can try tapping the end of the lock cylinder (where the key goes in) with the hanle end of a large screwdriver. Then insert the key and try to turn. Repeat this process several times. 99% of the time this will work. If you get it to turn than it needs to be replaced immediately. If you can not get it to turn than it will need to be drilled out to replace. The key needs to be in the run position in order for the locking tab to release. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Fuel can leak into engine oil if your piston rings are worn or your block could have a crack.

In regard to sender unit. Soak it in vinegar for a couple hours. Works awesome. I did this to my chevy pickup sender unit and now it works awesome. The problem is usually condensation over the years corrodes the brass wiper/rheostat. Vinegar is a mild acid and works excellent.

bring up oil life on the display then press and hold reset.