more than likely the coolant level is low otherwise check that the thermostat is functioning properly. if neither of those seem to be the prolem than you possibly have a blocked or bad heater core
It is in the front of the engine, to the right of the thermostat housing.
Your heater relay switch may be bad
Could be: Low coolant in the radiator - or - thermostat stuck open - or - heater core plugged.
The maximum towing capacity of a 1999 Chevrolet Silverado K1500 is 4,500 pounds. The maximum payload for this vehicle is 2,177 pounds.
1999
Will 15 inch wheels fit on a 2000 Chevrolet Silverado? NO THEY WILL NOT. They will hit the brake cailbers, won't fit.
Probably the fuel pump.
~26 gallons
1999 Black Chevrolet Silverado 1500 LS.
The 1999 Chevrolet Silverado serpentine belt assembly diagram can be obtained from most Chevrolet dealerships. The diagram is usually provided when you purchase the serpentine belt.
The alternator blocks access to it. You need to remove the serpentine belt, then the alternator to get to the thermostat.
1999 through 2003 0.060 inch