Reduced engine power

[Hungryhoe]

I just got a tune up and transmission service. Now my odometer reads reduced engine power and I can't go over 5 miles an hour. Supposedly my spark plugs, wires, fuel filter, and pcv valve were changed. The pedal goes to the flow but no power. It drove fine for about 30 minutes and wham. Gonna take it back but want some idea of what may have went wrong.

---------- Post added at 07:58 PM ---------- Previous post was at 07:56 PM ----------

Oh yea its an 03 tahoe and they were suppose to replace transmission fluid and filter

 

[dec322]

i have no idea but I want to know what happened.

 

[blueflamed03]

disconnect battery, sit for a couple seconds, then reattach, and it will reset computer, then see if it does it again......

 

[jESse]

mines been doing that to me when i give it more than 75%ish throttle. it resets itself after the yukon has been off for a couple minutes. i dunno why though

 

[wmgood64]

I would try what Blueflame said and i would give the garage that worked on it it a call to tell them about my displeasure.