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eassist mods.

Bill Gutman

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Bill Gutman Enthusiast

Bill Gutman

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Posted

just wanted to see what other owners are doing as to modifications of these trucks. Most of the mods i want to do  the people say they cant or wont work on an eassist truck. Also just started an eassist club take a look.

3tspapat Enthusiast

3tspapat

Posted
Posted

Hi,

 

I've done enough digging around to share my experiences:

 

Performance items: 

Cold Air Intakes: Only fitment issue is with CAIs since the coolant reservoir is moved to the front of the truck, just behind the radiator (stock location is replaced with another battery). Relocate the reservoir with some longer lines and all CAIs would work on the eAssist. I chose to trim the inlet pipe that came with the GM Performance Parts CAI and use a silicon elbow to get it to fit. Sounds great...at initial install my truck did take off faster because my wallet was lighter by about 0.3 ounces. 

 

Exhaust: Everything is the same as non-eAssist vehicles. Just remember eAssist will work to keep truck in AFM longer so you may want to keep the flapper or drive in D7 or get Range device. I'm running the GM Borla with flapper. Plenty loud and no chop in V4. Wife is super sensitive to sound and it's fine on long drives with her, but when she is riding in the truck I'm actually running 2 flappers...on kills V4 chop by controlling flow. The other kills all unpleasant sound by being louder and more unpleasant. If done differently, I'd go with Corsa Sport. Best sounding IMO.

 

I'm looking into SolerPerformance's TB right now. Debating if I want to try that out and if it would work or not without tuning and with my CAI. 

 

Tuning: No aftermarket support available. Demand isn't there so no company has spent the resources/funds to provide support. BUT it can be done, just need to find someone to do it. Definitely not worth the cost. Some tuners will say it's untouchable, can't be done, etc. That is crap. They are just too lazy or not enough know how/money. If it came with a factory tune, surely it can be tuned. This means forget about using aftermarket handhelds, etc. to get rid of AFM, change tire size, gear ratio, shift points, etc...will get a code that says "vehicle not supported". If you do regeared, larger tires, etc. the dealership would be able to reprogram those items for you.

 

AFM and auto start/stop: if you want to get rid of both, you can drive in D7. If you want to get rid of just auto start/stop, just drive in D8. If you still want to do both and keep 8th gear, you can use the Range device. Others have reported no issues with it. When I tried it out, vehicle would shift hard when coming to a stop. Not sure if it's the Range in combination with my CAI or what, but it does not do that when driving in D7 to deactivate AFM. I just drive with it on because that is how it's designed, and do frequent oil changes, etc. 

 

Suspension

Lots of suspension companies would say it doesn't work on eAssist vehicles probably because they've never tried to fit it. Just check the part numbers on eAssist trucks vs. non-eAssist ones and you will see that they are the same and so aftermarket suspension parts will work. Only issue is with calibrating the speedo, which the dealer or someone with the same equipment as the dealer and fix for you. My friend has a level kit and running 33s on his eAssist and hasn't changed his speedo. The shop told him they did, but they didn't. With the larger tires (and more load) the truck does not go into AFM as much anymore.

 

When times get better, I'm looking at Bilstein's all the way around, or if it gets way better, fox/king all the way around. 

 

I hope this helps!

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