20 Most Recent 2005 GMC Canyon - Page 3 Questions & Answers

Has anybody been under the dash recently? I get the impression there is one of the multi pin wiring harness plugs not quite connected. Get under the dash around the heater box and do the wiggle test with the heater fan switched on and see if anything happens. Also check the fuse box for a dirty fuse connection, sometimes wiggling the fuse can clean the connection. The fuse box lid will tell you which fuse.

P0420 OBD II Trouble Code The above link will provide a lot of inforamtin about the P0420 trouble cdde.

Ok I'm going to be honest and tell u the truth, this exact thing happened to me. There is a 4 part pigtail relay plug connecting to a transister, the high only works because it bypasses the transiter and go directly into the fan power, but setings 1,2,3 eventualy and no longer usuable due to the transister input to the specific speed burning out, u can lose differnt speeds and differnt times depending on which speed u prefer the most. If u prolong the repaire even longer it will cause a short and u will burn fuses or even the main fuse in your fuse box. How to fix. I didn't perform the repair but I read that the relay and the pigtail are both located next to the fire wall. It cost me a few hundred dollers, and only 35 dollers for labor, the rest was the transister and the pigtail being the most. Sapposidly it was vary easy to get to, and if you look in a haynes repair manual it will give you the electrical scymatics of the wireing for the fan blower control.

When the warning light is on, the alternator is not charging the battery. So you should have the alternator output checked when the light is on.

Check the fuses for the lock and the window...

Sounds like I a possible multifunction switch l

The resistor provides the ground circuit for the blower motor. So you would need to have power at the blower motor first. Grounding the motor or resistor should make the motor run. The blower motor gets power from a 30amp fuse which gets power from a relay.

they should be about a 20 amp and ether side by side or up and down from each other.. parts store can give a readout or dealer service..

Wish this may help you!Chinasinoy

take a rubber mallet and pound on the back side,turn the rotor a little and pound again until it comes off