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2010 Escalade Ext Magneride . Rear shocks and compressor needed replace . Replaced Magneride rear with two Skyjacker H7017 Softride Hydro shocks and two Firestone spring assist airbags inside the rear springs . Since then the truck loses engine power at 75 mph. The engine is still running but at reduced rpm with no response to gas pedal . The only code that came up was for oil pressure sensor high voltage . 'Service suspension system' has been showing long before switch from magneride to hydro rear shocks . The wires that went to the factory stock magneride shocks are now attached to nothing . My question is what should I do with these wire? And, does anyone know if this could be the cause of the loss of power at 80mph ? Thank-you for any suggestions. Additional Notes: For the last 5 years I commute 5 days a week an hour each way on a major highway . I get to the fast lane , set cruise at 129kmh (80mph) , rarely have to tap the brake and resume, never been pulled over, the truck makes for a comfortable commute . I make this point because I can get the truck to 129kmh (80mph) but within about 5 seconds the engine power is reduced and does not respond to the gas pedal manually or the cruise control. On cruise control at 80mph the truck with slow down to 70mph then the transmission shifted down and the engine rpm's went from under 2000 to 3500 as the cruise control must have been putting demands on the truck trying to get back to its 80mph set cruise speed but it couldn't and the engine rpm jumped from 3500 then to 2300 and the transmission was clunking as it went from gear to gear trying to figure out what it was supposed to do .