Hello all,
I am new to this site but I am having issues with my 06 envoy and was hoping for some help. I realize it is a long story, but I figure the more details I give the better the resolution may be.
Truck history
I bought this Envoy as an abandoned vehicle. It had a blown engine that I replaced with a used one from a boneyard. The truck had 207,000 miles, the replacement engine had 96,000. Check engine light has always been on even after the engine replacement but truck has run great for the past four years. It now has 232,000 but like I said the truck ran great for the past 4 years until January of this year.
I had the truck running while I was pressure washing the road salt off of it. The doors locked by themselves for what ever reason. Thankfully I had the spare FOB in my pocket so I was able to get it, but the drivers door refused to unlock. I climbed in through the passenger door, shut the truck off til I could get the driver door open, (took like 2 minutes) then the truck wouldn't start (dead battery) Did a quick charge and got it going. Heading into town doing 70 on the interstate it felt like someone rear ended me ( the truck just all of a sudden lurched as though I was rear ended.) got to town, checked the tranny fluid and it was low (about a quart) I added a quart and have had no issues. A week later, the truck barely started on its own, but did start. I headed to town to go buy a new battery. On my way to town I noticed the clock was set to 12:23 (it was 5:38 p.m. ) why was the clock set on the wrong time? Was it because the battery barely started the truck? Anyway, left it running at the first store, no issues, at the second store, I parked the truck (never shut it off) decided to go to a different store instead and went to leave and the truck wouldn't move. I checked the tranny fluid and it was bone dry, nothing on the stick. I added 2 and a half quarts then was just below the hash marks on the stick, Added the last half wuart the it was half way up the stick, Not just above the hash marks but actually half way up the stick. Truck wouldn't move. After idling for a few minutes the tranny would finally grab but as soon as I would accelerate it would slip and I would have nothing, I was pulled home by a buddy and after I got it home I finally shut it off, then decided to check the fluid level and just for shits'n giggles I put it in drive and I could almost do a power-stand. The tranny is grabbing. Shut the truck off and check the fluid, still half way up the stick. I drained the fluid to the proper level (removing 3 quarts) now at proper level once again, but the tranny would grab until I would shift from drive to reverse, reverse grabs, but then back to drive and there is nothing, no 1st no 2nd no reverse, nothing I tried changing the transfer case setting, 4 hi 4 lo 2wd, nothing made a difference. shut the truck off for about 2 minutes, restart it and then the tranny grabs fine until I change the shifter to reverse and back to drive or another forward gear. I have no leaks under the truck anywhere and I have no idea why the tranny fluid lvl was bone dry and then half way up the stick.
What I want to know is "What is causing this issue?" Could the BCM or other electronic be bad and causing this? If so, Is it possible the weak battery fried something in the computer of the truck and giving me all this grief? Any help would be appreciated.
I am new to this site but I am having issues with my 06 envoy and was hoping for some help. I realize it is a long story, but I figure the more details I give the better the resolution may be.
Truck history
I bought this Envoy as an abandoned vehicle. It had a blown engine that I replaced with a used one from a boneyard. The truck had 207,000 miles, the replacement engine had 96,000. Check engine light has always been on even after the engine replacement but truck has run great for the past four years. It now has 232,000 but like I said the truck ran great for the past 4 years until January of this year.
I had the truck running while I was pressure washing the road salt off of it. The doors locked by themselves for what ever reason. Thankfully I had the spare FOB in my pocket so I was able to get it, but the drivers door refused to unlock. I climbed in through the passenger door, shut the truck off til I could get the driver door open, (took like 2 minutes) then the truck wouldn't start (dead battery) Did a quick charge and got it going. Heading into town doing 70 on the interstate it felt like someone rear ended me ( the truck just all of a sudden lurched as though I was rear ended.) got to town, checked the tranny fluid and it was low (about a quart) I added a quart and have had no issues. A week later, the truck barely started on its own, but did start. I headed to town to go buy a new battery. On my way to town I noticed the clock was set to 12:23 (it was 5:38 p.m. ) why was the clock set on the wrong time? Was it because the battery barely started the truck? Anyway, left it running at the first store, no issues, at the second store, I parked the truck (never shut it off) decided to go to a different store instead and went to leave and the truck wouldn't move. I checked the tranny fluid and it was bone dry, nothing on the stick. I added 2 and a half quarts then was just below the hash marks on the stick, Added the last half wuart the it was half way up the stick, Not just above the hash marks but actually half way up the stick. Truck wouldn't move. After idling for a few minutes the tranny would finally grab but as soon as I would accelerate it would slip and I would have nothing, I was pulled home by a buddy and after I got it home I finally shut it off, then decided to check the fluid level and just for shits'n giggles I put it in drive and I could almost do a power-stand. The tranny is grabbing. Shut the truck off and check the fluid, still half way up the stick. I drained the fluid to the proper level (removing 3 quarts) now at proper level once again, but the tranny would grab until I would shift from drive to reverse, reverse grabs, but then back to drive and there is nothing, no 1st no 2nd no reverse, nothing I tried changing the transfer case setting, 4 hi 4 lo 2wd, nothing made a difference. shut the truck off for about 2 minutes, restart it and then the tranny grabs fine until I change the shifter to reverse and back to drive or another forward gear. I have no leaks under the truck anywhere and I have no idea why the tranny fluid lvl was bone dry and then half way up the stick.
What I want to know is "What is causing this issue?" Could the BCM or other electronic be bad and causing this? If so, Is it possible the weak battery fried something in the computer of the truck and giving me all this grief? Any help would be appreciated.
