Thanks for using JA,
I dont think it is a fuse problem. What you need to do is remove the blower motor resistor and unplug it from the blower motor and wiring harness. I am sure you will find that it looks burnt. Make sure you check the wiring harness connector and on both ends to ensure it looks good. To remove the resistor it is located on the passenger side floor and there might be a cover you have to remove first. The cover bolts are 7mm and the blower motor resistor bolts are 5.5mm. Let me know what you find and if I can further assist you.
This bulletin is being revised to update the model years that are affected and add the Oldsmobile Bravada. Please discard Corporate Bulletin Number 06-01-39-002B (Section 01 -- HVAC).
Some customers may comment that the blower motor is inoperative or continues to run after the vehicle has been shut off.
These conditions may be caused by a blower motor control module failure. This failure may occur when the vehicle is operated in ambient temperature conditions of -23°C (-10°F) or below.
Important: Replace the blower motor control module if the vehicle experienced a blower motor control module failure in extremely cold ambient temperature conditions.
Technicians are to replace the blower motor control module, also called the Linear Power Module (LPM), with the P/N listed below. Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.
Module Assembly, Auxiliary Blower Motor Control (Rear System on Escalade ESV, Suburban, Yukon XL)
Module, HTR & BLO & A/C CONT (Front system only vehicles - Except H2)
Module Assembly, Blower Motor Control (H2 Models)
Module Assembly, Auxiliary Heater & A/C Control (Rear System on Escalade, Yukon, Tahoe)
Instrument Panel Insulator Replacement Removal Procedure
Notice: Refer to Fastener Notice in the Preface section.
Tighten Tighten the bolts to 1.6 N·m (14 lb in).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the screws to 1.6 N·m (14 lb in).
if i tear this thing apart and can't do it myself. i assume the truck will still run to drive it to the dealership. what if i have questions once i get it apart?
I don't know if you remember me but i had the tahoe with the fan that wouldn't work on 1-4 but would work on 5
Anyway i have the cover off and took off what appears to be the blower motor control. it has a green circuit board that missing some of the green coating and is really dirty and looks to be burnt is this what i i need to replace? when disconnected the 5 setting on the fan doesn't work either