I have an 02 Envoy SLT. About 2 years ago I did a bunch of upgrades. PCM of NC e fan, pcm tune, cold air intake, tranny cooler, alternator upgrade, upgrade alternator wires. This was done to increase performance, horsepower, economy In preparation to tow a camper.
My problem is about every 2 to 6 months I would burn out a relay and if I didn’t catch it fast enough I would also need to buy a new fan. I have tried numerous upgrades to the fan controls. put in an heavier duty fuse holder and increased the power wire size. I even tried go to a 60 amp solid state relay. Well needless to say I just finished putting in a new to me engine last week Due to multiple instances of overheating (Long story). While I would like to stay with the e fan, I’m done with it for now. I’ve been in touch with PCM of NC. In discussions with them, they mentioned a cou options, on is putting in a thermal fan from an 08. After doing research on this forum, I think that’s what I’m go to do. This will let me keep and go back to the e fan pretty easily if/when I want to. My question is I was looking on Rockauto. in the thermal section for the 08 Envoy, they show one “Four Seasons“ brand with a harness attached the rest don’t show a harness. Do I need one with a harness attached or not. I’m kind of wondering if that one is in the wrong place. I saw a post where Roadie had a link on how to do this conversion, but the link wouldn’t work.
Seeing how I already have the e fan retro done, my pcm fan codes are already removed.
Also if anyone has any ideas why I’m having repetitive problems with my e fan please let me know what you have done. I have a feeling it has to do with living in the south and the constant cycling of the relay and in rush current. I Was thinking of going to a brushless motor, increasing the solid state relay amperage to 100+ rating, (some research shows the used fan can draw up to 90 amps inrush amps upon start) and either buying or making a controller from an Arduino to limit the rapid cycling.
My problem is about every 2 to 6 months I would burn out a relay and if I didn’t catch it fast enough I would also need to buy a new fan. I have tried numerous upgrades to the fan controls. put in an heavier duty fuse holder and increased the power wire size. I even tried go to a 60 amp solid state relay. Well needless to say I just finished putting in a new to me engine last week Due to multiple instances of overheating (Long story). While I would like to stay with the e fan, I’m done with it for now. I’ve been in touch with PCM of NC. In discussions with them, they mentioned a cou options, on is putting in a thermal fan from an 08. After doing research on this forum, I think that’s what I’m go to do. This will let me keep and go back to the e fan pretty easily if/when I want to. My question is I was looking on Rockauto. in the thermal section for the 08 Envoy, they show one “Four Seasons“ brand with a harness attached the rest don’t show a harness. Do I need one with a harness attached or not. I’m kind of wondering if that one is in the wrong place. I saw a post where Roadie had a link on how to do this conversion, but the link wouldn’t work.
Seeing how I already have the e fan retro done, my pcm fan codes are already removed.
Also if anyone has any ideas why I’m having repetitive problems with my e fan please let me know what you have done. I have a feeling it has to do with living in the south and the constant cycling of the relay and in rush current. I Was thinking of going to a brushless motor, increasing the solid state relay amperage to 100+ rating, (some research shows the used fan can draw up to 90 amps inrush amps upon start) and either buying or making a controller from an Arduino to limit the rapid cycling.
