Q: losing acceleration
My husband's 2009 GMC Acadia is stalling and loses acceleration when he drives anything over 45 or 50 mph. He got the codes read which indicated he needed a tune up which has been done (replaced the spark plugs ect..) and still continues, any idea what it could be? Fuel filter or fuel pump ?
My car has 120000 miles.
My car has an automatic transmission.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
What is the front crash severity sensor?
The air bag system in your car is much more advanced than those used even just a few years prior. It’s capable of determining just how severe an impact is and whether or not air bags should be inflated, and...
Oil pressure sensor flashing
First, you need to check the engine oil level. If it is low, top it off to the specified amount on the dipstick. If the level is normal, you may have a bad pressure switch that is simply not reading...
Car leaking oil and running rough
If these issues have all started right after the work was performed, then the oil leak needs to be found (https://www.yourmechanic.com/services/oil-fluid-leak-inspection). It is possible that it is just a loose oil filter. If the engine started running rough right after...
Startup problems, no dashboard lights but the headlights and radio are on
A faulty ignition could cause an issue where some systems receive "key on" power and others do not. If the vehicle is not starting with all dash lights and systems operational it could be an issue with the immobilizer circuit....
Popping out the exhaust and backfiring out the carb
Adding additional vacuum to the car when it is already backfiring will usually compound the problem due to the lack of fuel supply. Backfiring is most often a result of a lean condition. Adding transmission fluid to the fuel mixture...
Only drives in reverse
Hi. Your transmission has an internal problem with either the valve body, shift solenoid (https://www.yourmechanic.com/services/downshift-solenoid-replacement), clutches or torque converter. The only way to fix this problem is to rebuild the transmission or replace it with a new one. Sometimes a...
There's an oil leak coming from my valve gasket or VVTI seal oil area
Hello! Unfortunately, you are not able to upload photos. It sounds like your oil leak may be coming from the valve cover gasket not properly sealing. This can happen for a variety of reasons and is usually a fairly simple...
Battery light is on
It sounds like your vehicle has a voltage problem, which is often associated with a bad voltage regulator. When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to...
Engine shaking while in neutral and park
It's possible you may have disturbed a vacuum hose while you were doing the job, check for that first. But I'm concerned about the valves because If you get the valve clearance too tight, it may develop a miss at...
Related articles
A Buyer’s Guide to the 2012 GMC Sierra
The The 2012 GMC Sierra may not have sold quite as well as the Ford F-150, but that doesn’t mean you should dismiss this rugged and reliable model. For one thing, the Sierra is available in a half-ton version (1500)...
A Buyer’s Guide to the 2012 GMC Terrain
When When you look at smaller SUVs like the Honda CR-V and the Toyota RAV4, do you wish for just a little bit more space? But then when you look at the larger SUVs like the Ford Explorer or the...
Understanding the GMC Oil Life System and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The GMC Oil Life System indicates when and what service your car needs.
Browse other content
Services
Cities