Trailblazer surging problem Jan 19, 2012 路 My remaining problems is the truck will randomly (once or twice on a 15 minute drive) start surging and loose power under constant Accelerator position. What year is your Trailblazer? Customer: 2004 It starts at 40 to 65 miles an hour Mechanic's Assistant: Got it, a 2004 Chevy Trailblazer with surging issues between 40 to 65 mph. Is the check engine light on, if so what codes come up. Customer brought the truck in and was doing the same thing you are talking about. It will intermittently surge at speeds between 45 - 65 mph and 1,500 to 2,500 RPM. It seems to happen at various speeds between 30-65mph and if I let off the gas when this is happening and come to a stop (or put in neutral) it will drop to 500 rpm and sometimes die. This doesn't happen all the time, but I will be out driving at highway speeds, and I'll get a hesitation and loss of power, then it will clear up only to do it again. True surging is a lean condition. May 6, 2023 路 Our 2023 Trailblazer RS AWD (without adaptive cruise control) is doing this exact same thing. Mar 4, 2015 路 I have similar problems as those described above. With ours the cruise control has to be on , running about 1500 RPM, and on a slight incline. I was able to replicate with a service manager, they reset the computer and all was well for a while but is now doing it again. . There was a problem in the valve body of the transmission. If its not, its not the ecm or tune. 2 litre engine. Aug 1, 2013 路 First of all, u need to get it scanned fast. I have an '04 Trailblazer with the 4. Customer: Surging Chevy Trailblazer Mechanic's Assistant: I understand your Chevy Trailblazer is experiencing surging issues. If its surging, probably isnt, hat would be bad. Which shouldnt happen in a closed loop system. I have a 2005 trailblazer that did the same exact thing for months, eventually it went from surging one day to losing power at full speed. Took it in to the shop for repair; camshaft position sensor and both O2 sensors were replaced but the problem is still there. The problem will last a few seconds, hen go away. Can you tell me if the check engine light Feb 24, 2011 路 My 05 Trailblazer has what I would call a surging problem. vbmx nvod owql qdqm iof nxjdbrv lwub njleo dfhhorov zeg