Chevy Colorado Diesel Forum banner
141 - 160 of 204 Posts

·
Super Moderator
Joined
·
574 Posts
Just turned 65,000 a few days back.
 

·
Registered
Joined
·
383 Posts
2018 zr2 69000 hard miles zero issues since new until last week Def says its empty although the tank is full and now it is in limp mode. I have it parked while I wait for my new Def delete program to be delivered.
Sorry Dave, no joy. FMI, do you have a "30% left" on your driver information screen, like I do on my 2018 Z71? Askin' because I have been able to rely on mine (except when I chicken out and fill prematurely). I keep 2.5 gal on board when I think I'm close, and drain it all in when I get the warning. Since 2.5 gal is less than 5.2 gal*(100%-30%)/100% = 3.64 gal, I can drain the whole Walmart jug, and chuck it.

FYI, I get ~59 gal fuel/gal DEF. I know there's more to DEF injection than that, but I'm guessing that it's a large part of the injection algorithm. I have kept OCD track of this for 48K miles, city, highway, light and heavy loads. If anyone else has done this, what do you get?
 

·
Registered
Joined
·
3 Posts
Hello. No mine was reading correctly until last week it finally went down to 24% and I filled it up and it didn't reset and has dropped to 0 and went into limp mode. I opened the lid and topped it back off and it held about 1quart so that tells me the Def is still working but the computer thinks it's empty. I'm just deleting it all. How can the epa say that these trucks are cleaner to the environment when they use almost 30% more oil fuel and Def fluid than it will with the emissions removed over engeneered garbage off of it will do. Makes no since other than politics
 

·
Registered
Joined
·
3 Posts
I will post my results as soon as I get it all done. As far as getting the tune it's not from any American business since we are being strangled by the sky is falling socialist. The exhaust is a dpf back only so I have to buy the downpipe separately and any other filler needed
 

·
Registered
Joined
·
30 Posts
I will post my results as soon as I get it all done. As far as getting the tune it's not from any American business since we are being strangled by the sky is falling socialist. The exhaust is a dpf back only so I have to buy the downpipe separately and any other filler needed
I wouldn’t mind knowing were you are getting it from to also are you only doing def back for easy switchover for smog testing how does it work. I haven’t had any issues yet bet what ever I can do to make it run better and last longer I would want to look into it.
 

·
Registered
Joined
·
634 Posts
I got 134,000 km on mine when an injector failed and torched a piston.
GDE pre-EPA tune at 30,000 km.
I always used tier 1 fuel and changed motor oil and fuel filters at 50%.
NOT a happy camper....
Sorry to hear that, that's a major bummer. What's your plan moving forward, fix or replace the vehicle?
 

·
Registered
Joined
·
17 Posts
2017 with 60k miles. I have the tranny hard shifting from time to time, seems to be “normal”
Only issue was the transfer case front seal leaked, was covered under warranty. Otherwise it’s running well and averaging 28mpg without a tow load.
 

·
Registered
Joined
·
97 Posts
Sorry to hear that, that's a major bummer. What's your plan moving forward, fix or replace the vehicle?
I had 2 more pistons with witness marks in the pin bore.
Am changing all pistons and rings, con rod bearings as the top shells all showed wear.
All injectors out to be ultrasonically cleaned and flow tested.
Change timing belt and water pump which had wetness while in there.
Put it all back together, return tune to stock and run it.
Still love my Colorado.
Will back off a bit when max towing and pulling long hills.
We have some 10 minute, foot to the floor hills while towing.
 

·
Registered
Joined
·
485 Posts
I had 2 more pistons with witness marks in the pin bore.
Am changing all pistons and rings, con rod bearings as the top shells all showed wear.
All injectors out to be ultrasonically cleaned and flow tested.
Change timing belt and water pump which had wetness while in there.
Put it all back together, return tune to stock and run it.
Still love my Colorado.
Will back off a bit when max towing and pulling long hills.
We have some 10 minute, foot to the floor hills while towing.
You say the top shells all showed wear. This is what I was expecting from a tune that short shifts the transmission or holds its gear lower in the rpm.
Lugging any motor is not good , diesel or gas. And when you consider the diesel makes a lot of torque at low rpms, that’s a lot of pounding on the top shells in the rod ends.
I have read about people pulling trailers and getting the transmission to shift to 6th another bad idea as it lugs the hell out of the motor.
I have not been a fan of these aluminum pistons that GM is using ether.
Are you sure you want to reuse those bosh injectors? I don’t have a good feeling about them either.
Were you using a fuel additives to help lube the pump and injectors?
I to have to back off some as I been towing my 6000lbs travel trailer while using cruise control and let it run wide open up some big hills.
I will be flamed for this but I believe this little diesel is already running at about 80% max in stock form. Adding a tune and pushing it hard is a bad idea.
I like the idea of a transmission tune that uses lockup better but not allowing it to lug
A delete tune without adding more power would be good but it’s not available.
2.8 litres is tiny.
Glad your fixing it as these trucks with the diesel is an amazing combination. Especially when it comes to what we pay for fuel in Canada.

Rob
Nova Scotia.......
 

·
Premium Member
Joined
·
3 Posts
84,000 miles- 2018 Z71. No problems besides a check engine light. I reset the code and never came back. I just did the recall, for the dpf and installed the GDE tune. What a difference! Glad I did it and their support is on the money.
 

·
Registered
Joined
·
97 Posts
You say the top shells all showed wear. This is what I was expecting from a tune that short shifts the transmission or holds its gear lower in the rpm.
Lugging any motor is not good , diesel or gas. And when you consider the diesel makes a lot of torque at low rpms, that’s a lot of pounding on the top shells in the rod ends.
I have read about people pulling trailers and getting the transmission to shift to 6th another bad idea as it lugs the hell out of the motor.
I have not been a fan of these aluminum pistons that GM is using ether.
Are you sure you want to reuse those bosh injectors? I don’t have a good feeling about them either.
Were you using a fuel additives to help lube the pump and injectors?
I to have to back off some as I been towing my 6000lbs travel trailer while using cruise control and let it run wide open up some big hills.
I will be flamed for this but I believe this little diesel is already running at about 80% max in stock form. Adding a tune and pushing it hard is a bad idea.
I like the idea of a transmission tune that uses lockup better but not allowing it to lug
A delete tune without adding more power would be good but it’s not available.
2.8 litres is tiny.
Glad your fixing it as these trucks with the diesel is an amazing combination. Especially when it comes to what we pay for fuel in Canada.

Rob
Nova Scotia.......
I have decided to sell to someone that tows less and replace with a 1500 6.2 max tow package. Still love my Colorado but I have come to the decision that I need something a bit more robust. New injectors are $775 each here and they are cleaned and flow tested which is totally normal in HD business so am good with it. The injector shop noted that they flow more than the LP5 injectors! Weird.
 

·
Registered
Joined
·
485 Posts
I have decided to sell to someone that tows less and replace with a 1500 6.2 max tow package. Still love my Colorado but I have come to the decision that I need something a bit more robust. New injectors are $775 each here and they are cleaned and flow tested which is totally normal in HD business so am good with it. The injector shop noted that they flow more than the LP5 injectors! Weird.
Reliability with all the pollution control systems and sensors running at high temperatures is always on my mind. My truck came up with the (DEF quality poor warning) this week. I knew something like this was going to happen sooner or later. So I have bought all my DEF from the dealer. Watching the NOX sensors I noticed the 2nd sensor showing very erratic outputs.. The error has disappeared from the dic but the sensor is still very erratic. I pull 6k travel trailer in the summer and when any distance from home wonder if I will be next to be broke down some place and not able to get parts for weeks on end.
So I do understand going gas.... I can’t afford to put gas in a full sized truck with a 6.2.
I was totally against the 1500 with the 2.7 but have started to change my mind about that engine.
I have also been watching the 3.0 and I believe that engine will be much more problematic than the 2.8. Or you will go broke buying DEF and oil.....
unfortunate as the 2.8 Colorado is a great truck when it comes to fuel mileage....Especially with all the tax we pay on fuel......

Rob
 

·
Registered
Joined
·
43 Posts
Pulling a trailer I really think you’re better off with the 6.2. Having experience with a ecoboost, a FI gasser just EATS gas while towing. (because it needs a richer enrichment?) I would bet the 6.2 uses the same gas as 2.7 while towing. Then the rest of the way the 6.2 is the flagship, reliable, and experienced mechanics and parts everywhere. The turbos you really need a boost gauge and stay out of it lol
 

·
Registered
Joined
·
11 Posts
150,000 miles. Main issues are EPA exhaust Junk. Replaced a few sensors but get dash light for not regen often enough. only issue now is getting timing belt and water pump replaced due to parts shortage. Can't find places outside of dealer to work on engine. Otherwise, truck runs great and still does all I bought it for.
 
141 - 160 of 204 Posts
Top