I have a 2001 chevy silverado 4.8 had no heat changed the thermostat is work for a month and a half then back to no heat? Could it be another bad thermostat?

SOURCE: thermostat location 2001 chevy silverado 1500

The thermostat is in the hose on the passener side of the waterpump.It is in the part that has the three 10mm bolts.Please rate my answer, Thank you.

SOURCE: No Heat and Overheating in 1999 Chevy Silverado

hi on thoes trucks the theermostat must be put in with the little hole in the thermostat pointing at 12 oclock or pointing away from radiator to let all air out.and check for a colapsing hose stpoing the coolant from circulating. tyr that first

SOURCE: NO Heat in 1999 CHevy SIlverado

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

SOURCE: 99 Chevy Silverado is overheating after maintance on radiator

check radiator, could b blocked, check hoses, mayb they soft, while vehicle running c if hoses r compressing, if they r would b iether radiator or hoses

SOURCE: process to change fuel pump on 2001 chevy silverado 1500

DROP THE FUEL TANK MAKE SURE YOU GO ABOUT HALF WAY THEN UNHOOK ALL THE LINES AND TERMINALS SO AS TO NOT DAMAGE THEM ALSO YOU NEED TO RELEASE THE FUEL PRESSURE AT FUEL RAIL BEFORE REMOVING ANY LINES