Check your air filter, make sure it is clean. Try some Seafoam injection cleaner or a Good quality Injector cleaner. Also check the timing, there is a brown single wire close by the distributor that you have to disconnect. Then check the timing and then reconnect it. It will throw a trouble code, but that will clear.
Only for the high speed blower function. The lower speeds go thru the blower motor speed resister.
chevy truck
High-powered explosives.
no it don't
Replace the high speed relay.
Not the high side.
the low is always the big hose and the high is the little one
A vacuum leak is one possibility.
The Chevy 4x4 truck series is considered to be one of the most powerful 4x4 trucks on the market. It has a high towing capacity and better fuel economy than other competitor models.
A 1989 Chevy truck typically uses two leadlights for high beams. Leadlights, or headlights, are usually configured in pairs on vehicles for high beams and low beams. Therefore, it is unlikely that a 1989 Chevy truck would use four leadlights for high beams. It is important to consult the vehicle's manual or a qualified mechanic for accurate information on the specific headlight configuration for that model.
P1554 Cruise Engaged Circuit High Voltage
first lock the hubs,then with the truck in park ( if automatic ) or neutral if standard,,put the transfer case in 4 high or 4 low .