1999 Chevrolet Silverado 1500 - Page 8 - Answered Questions & Fixed issues

Wheel balance problems usually occur at speeds above 40mph. Also check driveline u joints for problems, but these usually show up when taking off and vibration at lower speeds. Check wheel rims for being bent and tires that are free of bumps or out of round.

Nearly any year will fit, that is, bolt in. But the newer you get, the more complicated the fuel injection and wiring gets! If you want just to use the mechanical end and bolt up your old fuel system, everything thing should work...just check all the accessory mounting brackets to be sure all the holes are there on the engine! If you switch from V-belts to a serpentine drive, you will have to use all the accessories that go with that engine...check compatibility of hoses and electrical plugs. Look over everything very carefully before you do anything, get manuals and info (like wiring diagrams!) to keep track of any changes that need to be made. Chevy is one of the easiest to do this with...it helps if you can have the donor vehicle at your location. If you can't do that, DON'T cut any wires or hoses because you may need them for the swap! GOOD LUCK!

in most other models that have an error trying to connect to an obd2 scanner is there's something wrong in the ground circuit in your vehicle. one has to painstakingly trace those grounds to make sure they're clean/ not corroded... then go from there

Probably time for a new battery. If it is 3-4 years old or older I would lean toward that. Take the truck to your local parts store and have them test the battery out.

Typically in my experience it is connected to the exuast under the car, not to hard to replace. Depending on the vehicle.

Do you have any lights on the dash lit ? SERVICE indicator (4WD/AWD) Lamp The SERVICE indicator (4WD/AWD) lamp is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle of malfunctions within the automatic transfer case (ATC) system. The SERVICE indicator (4WD/AWD) lamp is controlled by the transfer case shift control module via CKT 1567. this system will set DTC'S if there is a problem . Diagnostic Trouble Codes DTC B2725 ATC Mode Switch Circuit Malfunction DTC C0300 Rear Speed Sensor Malfunction DTC C0305 Front Speed Sensor Malfunction DTC C0308 Motor A/B Circuit Low DTC C0309 Motor A/B Circuit High DTC C0310 Motor A/B Circuit Open DTC C0315 Motor Ground Circuit Open DTC C0323 T-Case Lock Circuit Low DTC C0324 T-Case Lock Circuit High DTC C0327 Encoder Circuit Malfunction DTC C0367 Front Axle Control Circuit High DTC C0374 General System Malfunction DTC C0376 Front/Rear Shaft Speed Mismatch DTC C0387 Unable to Perform Shift DTC C0550 ECU Malfunction DTC C0611 VIN Information Error you probably should take this to a repair shop ! This tt

You may need to bring it to the chevrolet dealership the control module may have to be calibrated. I would call the dealership and ask them if the control module needs calibration...

check your coolant temperature sensor

try cleaning the sensor that turns on your headlights at dark. It may have become coated with something, nicotine, dirt, moisture etc.

sorry I have never had a problem like yours.

4-L 60 or 4-L 80. 4wd.

I would check the following things first: Fuses/Relays/Solenoids If everything inline is good, then replace the switches. Your truck IS hitting sixteen years old now, so it really could be anything in the line from the switches to the transfer case.

First off if you dont tow trailers start on the double filiment bulbs check for burn out
Second if you tow trailers or removed spare tire from under bed you probably loosen a ground wire on the wire harness under bed
Simple to fix once found
Tools need test light with ground gator clip
Rock for pressing brake pedal down or second helper on brakes
And a battery jumper
More than likely a wire pulled out harness on its back end
I had same problem it happened to be a pulled ground
150 miles from no where midnight cop pulls me over after he left got under truck moved some wires it came on then went off
It just needed to be pushed in little further in harness
Used a nail and glow of phonepushed in drove home
This wire problem for me was cause i bought new fuel pump removed bed forgot a ground wire it pulled out

Your parking brake is on, or there's a problem with it.

Did you find the sending unit and was that the problem?

Vacuum leaks. Check hoses. Also check the intake manifold at the gasket. To check the intake (have the MAF plugged in) Spray some wd40 around the intake at the gasket seal. If the engine starts running fine at some point. Replace the intake manifold gasket.

Check your wiring harness and connector for defects, and have your MAF checked for integrity. Sounds like the sensor is sending a bad signal to the ECM when plugged in and the ECM automatically switches to default over ride when it sends no signal.

Ok well there is only two things that make a combustion engine run! If you are getting gas to the fuel rail and it has adequate fuel pressure at the rail then you have a spark problem! Pick up a spark tester( looks like a plug wire in a way but has a light ) Plug it into the first plug on the right side of the motor,(# 1 cylinder) and have a friend turn over the motor. There should be positive spark and the light indicator should light as a constant . If it is intermittent in any way than spark is why u will not start. Then on these years I always start with a new coil or coil packs depending on your type of engine! Hope this helps!! Just my opinion and I could be wrong ! Good luck. Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jeff_24365d731679262d

if you can reach the heater box. see if you can "feel" anything moving in the area of the air mix door, if the controls are the rotary style, it is somewhat common for the controls to be bad. There are no conventional cables with this system, it electrically controlled...

Sounds like you either have a light staying on in the glove box or under the hood. If that's not it, then you may have a relay that does not turn off. This sucks because there is so many of them and finding it can be tricky