Joined
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13 Posts
Where do I start.... my 16 was built in March of 16 and I purchased it in June of 16 with 24 miles on it. I paid $47,600 for it. I got ever option I could. Duramax, long bed, z71, trailboss package, navigation, big screen, Bose sound... blah blah. The issues never stop!
My first issue was at 3,000 miles with the 4 wheel drive. It was in and out of the shop for that issue till 26,000 miles before It was finally fixed it. and weeks at a time not having a vehicle! It took me going to 2 Different dealerships and them replacing the switch 3 times the actuator. And finally it was some bad wire between the switch and computer that was bad. I was getting “service 4 wheel drive“ light. Then it started locking itself into 4 wheel drive when ever it wanted. It also locked into 4 low randomly twice on me. 1 of those times I was doing 70mph down the interstate and the truck went into 4 low. Message popped up ”reduce speed to 3 mph in 4 low”. The rpms maxed out. Gears grinding! Other vehicles behind me locking their brakes up so we don’t have a big ass pile up! Of course gm didn’t believe me cuz they said it has to be in neutral before it will shift to low. Well I proved that wrong!
15,000 ish I had a cylinoide go out in the shifter. l couldn’t put the truck in park and turn the key off. Well the fix for that was a whole new shifter!
Next is loosing oil! I have took my truck in religiously for every oil change. I started getting low oil lights. I went thru 3 oil changes before they would investigate what was going on. They said it had to be documented. So with that said. All 3 oil changes the motor was
1 1/2- 1 3/4 quarts low on oil. They said it’s in gms spects of being ok. Oil pressure was also noted for dropping down to 8 psi when at ideal. That also was in gms spects cuz it wasn’t below 6 psi. And they could never find where oil was going. Outside of motor clean, no drips. Coolant was clean, turbo clean. I’m still having that issue at 76,000 miles. So months in and out of the shop. Weeks at a time.. Never fixed!
At 46,000 miles I was driving down the open highway, empty no load... cruising 55mph and ding ding ding! “Shut engine down overheating ” light popped up! then followed by steam and coolant all over the place. So towed to shop. They looked it over and said there was a hole in the coolant tank. (Note it’s a $300 plastic tank not under warranty) So they put a new tank on after my truck sat there a week waiting on it. They started it up and boom over heated again. The problem after having it 3 more weeks! A bad head! The dealer said when they took it off and all 4 cylinders had groves in in them. Their excuse was the head wasn’t centered right when the motor was assembled. Which that’s very hard for me to believe when everything is machined to the exact. So how can you get bolt holes off that much?? So I now have a rebuild $50,000 Colorado with 46,000 miles! I told gm I wanted a new motor not a rebuild in my new truck! Well they said.. we will put a new head on forr ref now and we have to send the bad one off for testing before any decision is made. Guess what? 2 years later and haven’t heard back on them test results!
4 case numbers later months not have a truck. 76,000 on the truck and now I’m having emission codes with reduced engine power. Truck is sitting in driveway. I don’t even care to get it towed And looked at. I’m tired of it!!!
The best full mileage I ever got was 26.3 1 time. I average 20-21 no matter where or how I drive it. So not sure how it’s so low to everyone else’s on the forum lol.. I’m sure I’m forgetting something.
My first issue was at 3,000 miles with the 4 wheel drive. It was in and out of the shop for that issue till 26,000 miles before It was finally fixed it. and weeks at a time not having a vehicle! It took me going to 2 Different dealerships and them replacing the switch 3 times the actuator. And finally it was some bad wire between the switch and computer that was bad. I was getting “service 4 wheel drive“ light. Then it started locking itself into 4 wheel drive when ever it wanted. It also locked into 4 low randomly twice on me. 1 of those times I was doing 70mph down the interstate and the truck went into 4 low. Message popped up ”reduce speed to 3 mph in 4 low”. The rpms maxed out. Gears grinding! Other vehicles behind me locking their brakes up so we don’t have a big ass pile up! Of course gm didn’t believe me cuz they said it has to be in neutral before it will shift to low. Well I proved that wrong!
15,000 ish I had a cylinoide go out in the shifter. l couldn’t put the truck in park and turn the key off. Well the fix for that was a whole new shifter!
Next is loosing oil! I have took my truck in religiously for every oil change. I started getting low oil lights. I went thru 3 oil changes before they would investigate what was going on. They said it had to be documented. So with that said. All 3 oil changes the motor was
1 1/2- 1 3/4 quarts low on oil. They said it’s in gms spects of being ok. Oil pressure was also noted for dropping down to 8 psi when at ideal. That also was in gms spects cuz it wasn’t below 6 psi. And they could never find where oil was going. Outside of motor clean, no drips. Coolant was clean, turbo clean. I’m still having that issue at 76,000 miles. So months in and out of the shop. Weeks at a time.. Never fixed!
At 46,000 miles I was driving down the open highway, empty no load... cruising 55mph and ding ding ding! “Shut engine down overheating ” light popped up! then followed by steam and coolant all over the place. So towed to shop. They looked it over and said there was a hole in the coolant tank. (Note it’s a $300 plastic tank not under warranty) So they put a new tank on after my truck sat there a week waiting on it. They started it up and boom over heated again. The problem after having it 3 more weeks! A bad head! The dealer said when they took it off and all 4 cylinders had groves in in them. Their excuse was the head wasn’t centered right when the motor was assembled. Which that’s very hard for me to believe when everything is machined to the exact. So how can you get bolt holes off that much?? So I now have a rebuild $50,000 Colorado with 46,000 miles! I told gm I wanted a new motor not a rebuild in my new truck! Well they said.. we will put a new head on forr ref now and we have to send the bad one off for testing before any decision is made. Guess what? 2 years later and haven’t heard back on them test results!
4 case numbers later months not have a truck. 76,000 on the truck and now I’m having emission codes with reduced engine power. Truck is sitting in driveway. I don’t even care to get it towed And looked at. I’m tired of it!!!
The best full mileage I ever got was 26.3 1 time. I average 20-21 no matter where or how I drive it. So not sure how it’s so low to everyone else’s on the forum lol.. I’m sure I’m forgetting something.
