Question about 1999 GMC Sierra
Most regulators are in the back of the alternator and the 2 wires on the connector are the connection . The big wire to the alternator terminal is connected to the battery .
Posted on Oct 12, 2013
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Posted on Jan 02, 2017
SOURCE: window regulator
If you are a hobby or trained welder you can fix the regulator provided the only problem is a broken cable. Remove the entire mechanism from the door and lay it out on a flat clean surface.I bought 1/8 cable (1/16 is actual size but 1/8 works on mine) and silver soldiered a hollow metal nipple onto the end of the cable. You have to install the cable on the drum first...measure the overall length of the old cable and then the resulting tension will be correct. If the old cable is too frayed for a length calculation then install a long length of cable onto the drum bolt on the regulator/motor mechanism and use needle nose pliers to hold cable 'extended' against the spring tensioner.
The entire mechanism can be installed into the window/door frame with a twisting movement which allows the two frames and motor etc to pass by the door interior structure until it lines up with the bolt holes. If you're really careful and have small arms you can place the window on the bottom of the door leaning against the door away from you and all the way toward the door hinges. That way you avoid issues of window removal and installation into a curved frame and rubber seal.
By the way, a new motor/regulator complete assembly is about $100 so weigh that against your time when you decide which way to go.
Posted on Oct 19, 2008
If your Sierra has a Duramax, it may be the intake air heater or the fuel heater cycling on and off in the cold weather. But if its pulling the voltage down to 12V after warmup, I would suspect a poor battery. As suggested, get a load test at autozone or ??
Posted on Jan 25, 2009
SOURCE: rough idle,runs fine on highway
It is possible that the regulator is leaking into the intake plenum, or one of the injector lines has a bad O-ring and is doing the same thing. This was actually a big problem with this system on the 4.3L engines, but it is a little different on the 5.7. Before tearing into this this though, I think it would be a good idea to get a professional diagnosis. I would start with a compression test. The miss could be caused by low compression in one or more cylinders. The injector assembly has the regulator mounted right on the side of it and the whole assembly resides inside the intake plenum. It is not that difficult a job, requires some patience and skill, the worst part is the cost of the parts.
I've attached a picture of the injector assembly with the reg attached and highlighted
Posted on Mar 19, 2009
1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).
Posted on Mar 06, 2010
It is probably the fuel pump. If I remember the number correctly, this fuel system needs about 50 lbs to open a valve.
Until this valve opens, no fuel gets to the fuel nozzels.
Posted on Apr 30, 2010
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