20 Most Recent 1999 Chevrolet Silverado 1500 - Page 5 Questions & Answers

Can you check fuel trims at idle and under load?
If fuel trim is high at low speed and load, look for a vacuum leak.
If fuel trim is high at high speed and loads, look for fuel volumn problem or restriction.
If fuel trim is high at all speeds and loads look for pcm input fault, maybe a maf sensor problem?
If fuel trim is negative low speed and load, look for fuel pressure regulator or injector leak. If fuel trim is negative at all speeds and loads check ect and iac.

If you have the spider fuel system, that system is noted for problems. key on engine off, 60--66 psi fuel pressure.

1999 Chevrolet... | Answered on Mar 06, 2017

I had a 96 tahoe 5.7 that gave me hell with the Distributor sparking to the wrong terminal. These Vortec engines use computer controlled timing, but still use a rotating distributor to determine which cylinder the coil's spark goes to. Twisting the distributor does not set the timing like it did for older engines, instead it just sets where the rotor is pointing relative to the cap when the computer decides to fire the coil. Aligning the rotor to the cap's electrodes at the instant of spark is called having the cap "indexed" to the rotor.

In my case the distributor was a few degrees off after an intake gasket change. The engine ran fine for a while, but was always sparking off to one side of the electrodes in in the cap due to mis-alignment. After a while, that side of each electrode became corroded, and rather spark around to the far side of the electrode, it was actually a shorter path to the clean side of the next electrode over. This resulted in stumbling and misfires.

I rotated the distributor a few degrees toward the corroded side and changed the cap and rotor. The next cap and rotor went about 10k further before acting up. I rotated towards the corroded side again, and the same cap and rotor have been running ever since.

Scribe a mark on your distributor and intake for reference and twist the distributor a few degrees towards the corroded side of the electrodes in the cap as the cap sits on the distributor. Don't forget if you take the cap off and flip it upside down, then you need to reverse the direction you twist. You want to twist the distributor cap towards the corroded side with the cap sitting in place on the distributor. This will help move the cap's electrodes closer to the center of the spark-range (as the computer jockeys the timing around, where the rotor electrode points at the instant of spark moves).

1999 Chevrolet... | Answered on Feb 14, 2017

What lights ? And won't start how ? The clicking is more then likely a relay or a module of some sort . When you turn the key to the start position does the start engage an spin the motor ? Or nothing happens , a crank no start or no crank no start !

1999 Chevrolet... | Answered on Jan 09, 2017

65 foot pounds on Chevy v8

1999 Chevrolet... | Answered on Dec 23, 2016

How do you know the blend door is stuck , could be a bad actuator .

1999 Chevrolet... | Answered on Dec 07, 2016

flush the heater out with a hose.   the fastest and cheapest.   if that dosen't work then replace the Air blend actuator motor.  $59.99 at Auto Zone  part    # 604-101

1999 Chevrolet... | Answered on Oct 30, 2016

What exactly isn't working? the blower motor? If so then you may need a new blower motor harness from the switch to the blower, the connector burn up (under sized wiring) at the dash control head, you will also need a new blower speed control switch.

1999 Chevrolet... | Answered on Sep 30, 2016

Remove the oil cooler adapter.

1999 Chevrolet... | Answered on Sep 14, 2016

If your original problem was low fuel pressure recheck pressure and check for flooding of gas in the intake. These models have a bad problem with the plastic tubing feeding the fuel injectors and you might be looking at replacing the injector assembly. If ok check for sticking egr valve or intake leak.

1999 Chevrolet... | Answered on Aug 31, 2016

I haven't worked on that vehicle but in my experience it probably is the water pump. That is how you know when it goes bad

1999 Chevrolet... | Answered on Aug 22, 2016

I don't see you did anything wrong per your description.
With the engine off, check the level of the transmission oil, replace the dipstick, start the truck and recheck the fluid level, level should drop. This will indicate the front pump is working.

Next, with truck running, put transmission into any gear, then return to park position. Do you hear any ratcheting noise.

Let me know.

1999 Chevrolet... | Answered on May 13, 2016

change the fluid and filter if u havent already if that dont fix problem have trans. checked out u didnt say how many miles are on the vehicle?

1999 Chevrolet... | Answered on Apr 19, 2016

there is a vehicle speed sensor on the transmission and one on the rearend...have those two replaced and that should solve your problem

1999 Chevrolet... | Answered on Apr 19, 2016

Hi Martin Im AL the owner of Big As Auto Repair.

Martin, the charging system has what you call a fusible link that runs from the positive battery terminal all the way to the alternator. Somewhere along that fusible link it has either corrosion built up are has been damaged and came apart. usually its a large green wire but is different on some vehicles. If you need more help go to my auto-repair-help-website here: http://www.bigasautorepair.com/

1999 Chevrolet... | Answered on Apr 15, 2016

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