Duramax Diesels Forum Truck of the Week
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Old 05-14-2018, 05:27 PM
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Default 2015 warranty

Iím looking at 2015 Denali with 77k on it. The truck is not for sale at a GM dealership. Just curious if the 5/100k warranty transfers to me when I take possession. I wonít have the money to delete it right away. And I donít have an extra 10k sitting around to replace the fuel system. Iíve heard the horror stories of the cp4 and emissions systems, and quite frankly they have me a bit nervous. I have an 03 lb7 now so the emission stuff is all new to me. Thanks
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Old 05-14-2018, 05:50 PM
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Yes it transfers
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Old 05-15-2018, 09:13 AM
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107k miles on stock cp4.2.(bought truck new with 700 miles on it) Full delete. No codes. No problems. Desired and Actual RP are ideal. I use additives in the fuel as its humid here. Filters drained daily to release any water. I havent had any problems with the cp4 but do plan on making the cp3 swap in the future.
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Old 05-15-2018, 01:31 PM
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My truck has 72k on it. Bone stock other than a Fass 150 Cp4 is doing fine so far. I wont be going with a CP3 though once warranty is up due to hearing about surging issues. Exergy makes a screen that i will probably use. Hoping to hear some more real world trials with it though.
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  #5  
Old 05-15-2018, 02:48 PM
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Quote:
Originally Posted by scramHD View Post
107k miles on stock cp4.2.(bought truck new with 700 miles on it) Full delete. No codes. No problems. Desired and Actual RP are ideal. I use additives in the fuel as its humid here. Filters drained daily to release any water. I havent had any problems with the cp4 but do plan on making the cp3 swap in the future.
you really drain every day
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  #6  
Old 05-15-2018, 05:35 PM
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Cp4 failures can be hit or miss. Clean fuel is key, you're pretty much guaranteed issues if you get a tank of water. Don't count on GM to warranty a fuel system either. They'll try to find a way to get out of covering it. There are arguments that a lift pump may help but no real proof. Certainly won't hurt (the truck, could void warranty though) Pretty much just luck of the draw. It may go 400k miles, it may not make 100k. All in the fun of a cp4.

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  #7  
Old 05-16-2018, 04:25 AM
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Quote:
Originally Posted by TowU4Free View Post
My truck has 72k on it. Bone stock other than a Fass 150 Cp4 is doing fine so far. I wont be going with a CP3 though once warranty is up due to hearing about surging issues. Exergy makes a screen that i will probably use. Hoping to hear some more real world trials with it though.
I agree, I drove a cp3 swapped 15, it was like an lbz with a bad FPR. No thank you! I've looked into the energy cp4 pump, if I keep it, I will swap that pump in to it...
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2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help.
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  #8  
Old 05-16-2018, 06:28 AM
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Quote:
Originally Posted by TowU4Free View Post
My truck has 72k on it. Bone stock other than a Fass 150 Cp4 is doing fine so far. I wont be going with a CP3 though once warranty is up due to hearing about surging issues. Exergy makes a screen that i will probably use. Hoping to hear some more real world trials with it though.
Quote:
Originally Posted by NC-smokinlmm View Post
I agree, I drove a cp3 swapped 15, it was like an lbz with a bad FPR. No thank you! I've looked into the energy cp4 pump, if I keep it, I will swap that pump in to it...
It's all in the tuning, it takes several test tunes to get it right no tuner can have it right on the first try it's physically impossible

If you are driving on a cp4 you are literally playing Russian roulette with your truck, just let that sink in
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  #9  
Old 05-17-2018, 12:21 PM
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Damn now you guys got me worried about buying a cp4 truck. I don’t have the extra funds to fix it if it were to grenade on me.
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2003 lb7 extended cab LT, 132k.... 4" MBRP exhaust, FASS fuel system, s&b intake, egr delete, and EFI live by ATP
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  #10  
Old 05-18-2018, 04:42 AM
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Don't worry much, I have only personally seen one cp4 grenade. Just buy your fuel from a known good source...
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2010 GMC 1500 SCSB Denali Clone < lifted 22's/33's, Kooks, Magnaflow, 5.3, 6l80, TVS1900, lots of boost, Mayhem tuned, etc...

2015 Corvette Stingray Z 51 < Stock...

2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help.
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  #11  
Old 05-18-2018, 10:49 PM
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Do you guys think 46k is a fair price for the truck? I was hoping to talk them down a little bit more.
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2003 lb7 extended cab LT, 132k.... 4" MBRP exhaust, FASS fuel system, s&b intake, egr delete, and EFI live by ATP
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  #12  
Old 05-19-2018, 05:27 AM
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Quote:
Originally Posted by Dave69 View Post
Do you guys think 46k is a fair price for the truck? I was hoping to talk them down a little bit more.
Seems right for here in FL
Being itís a Denali. 42-46 with those miles
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  #13  
Old 05-19-2018, 10:32 AM
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Quote:
Originally Posted by Dave69 View Post
Do you guys think 46k is a fair price for the truck? I was hoping to talk them down a little bit more.
I think that's about right...
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2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help.
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