Question about 1999 GMC Sierra
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Posted on Jan 02, 2017
SOURCE: spark plug wiring diagram
I dont understand why you would need that unless you took off all the wires and took out all the plugs and forgot how the wires were.I have the same truck and I always do the plugs and wires one at time to make sure I make a mistake.If this is your ploblem let me know because i might be able to walk you though it.
Posted on Jan 22, 2009
unhook the battery, there are 2 wires on the starter solenoid, 1 is a 5/16 nut and the other is a 9/16 nut remove those wires. this maybe easier to remove the heat shield first. next ther are two 9/16 bolts holding the starter in position, remove, and the starter will come out, about a 15min job
Posted on Sep 27, 2009
Defrost is the default position. Is the control a autyomatic temperture control unit? ( you set the temp and select automatic) if it is the system is completely electronic. You push the buttons and the control still says defrost or can you select something else and the control shows it but it just keeps coming out the defrost? If the control changes and the air comes out the defrost anyway and the cheack engine light isn't on, then the problem can be blown fuses or an air door actoater not working. Does the dash emit a clicking sound? if it does with the covers off the bottom of the dash reach around touching the different pieces till you touch the idem that is clicking. this is an acutor motor, or blend door motor. they have gears in them that wear out and break the motors aren't repairable and you just replace the ofending motor. the door that is moves can be stuck. and may have to be freed up with blaster, WD40, or other rust buster till it moves easy. maybe after getting the door to move smoothly you can get the old motor to move the door wiithout having to install a new one.
Posted on Jan 06, 2010
GM Full-Size Trucks 1988-1998 Repair Information
Blower Motor - REMOVAL & INSTALLATION
Without Air Conditioning
(see Figure 1)
Fig. 1: Blower motor wiring
1991-98 C/K With Air Conditioning
(see Figure 4)
Fig. 4: Auxiliary heating and A/C system
Hope this help (remember comment and rated this).
Posted on Mar 31, 2010
The timing (base), is 0 degrees before tdc. Keep in mind the timing connector must be unplugged. usually a brown wire with a black tracer, has a single connector, located under glove box, or by distributor. Thanks...
Posted on Sep 22, 2010
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