I have an 95 sierra z71 and it was stalling and sometimes it wouldnt start for a good half hour. this is the best product i have ever bought. ...read more From: Ray S.
My 96, 6.5TD is a new truck after installing these units.
Can recommand these for all of you looking for more power & torque.
The gear shift improver is also a must to have. Have not tried full power yet, as I want to "break" the engine in step by step.... ...read more From: Jarl Ove in Bergen - Norway