Well I found out that in April of 05 they made a change in the trannys boost valve and I had to put the stock one back in. Drove around the neighborhood with open exhaust warmed her up gave it half throttle and it squatted down and bolted. I still have to break in the motor and torque converter so I didn't nail it . Thiss thing is faster half throttle than my old TBI. Do these sts Yank 2700 converters make your tranny shift smoother? When this thing shifts its just a little firmer than my stock 04. Funny thing the only gauge that worked was the gas gauge. How do you post these big pics? Thanks
91 Silverado 2005 5.3 ,transgo hd2, Yank2600, Nelson Tune, 3" exhaust, 4-6 drop
2004 Silverado crewcab 5.3 3'' Magnaflow exhaust