2011 GMC Terrain Engine cooling Problems

“We purchased the Gmc Terrain with the 4 cylinder engine for the gas mileage of 32 mpg, after getting only 26 mpg we called Gmc and took the Terrain in for service. Also filed complaint with Gmc. Was told their was nothing they could do. The engine makes noises and runs rough and stalls at times mostly in the mornings. After service now we get only 25 mpg.”

“There was a recall for my vehicle to replace the high pressure fuel pump. This was replaced and 1 week later the check engine light came on. Taken to dealer. Diagnosed as catalytic converter. The catalytic converter is under a public service extended warranty (10 years, 120,000 miles whichever comes first). Of course I now have 138,000 mile on the vehicle. Gmc will not cover repair costs. This should be a recall not an extended service warranty. The vehicle was moving when the light came on. …”

“3 problems with my 2011 Gmc Terrain awd, 2.4 liter 1. Poor gas mileage - averaging 18.8 miles for a vehicle rated 20 city, 29 hwy. I drive 42 miles daily, 4 city, 38 hwy. Dealer checked, no codes and states operating as per deigned intent 2. Jerky transmission shifts and severe hesitation on startup and slow speeds in eco mode. Dealer checked, no codes and states operating as per deigned intent 3. Engine knock on startup that last from 3 to 10 seconds, normally on cold startup. …”

“The same issue happened 3 times. November 2013, 28 january 2014, 16 february 2014. Each time the vehicle was in and idling situation red light, in a fast food drive thru, heavy traffic, or if I forgot something, left the car running, and went into the house to get what I was looking for, especially if it took me 4-5 minutes to find what I was looking for and return to the car. Additionally, I've experienced this moving at speeds of 8mph or less in thick traffic. (1) car would for no reason start rough idling. (2) the yellow check engine light would come on. …”

“I have a 2.5 month old 2011 Gmc Terrain. At 4984 miles it is in the shop for stalling, for a horrible rattle upon start up, and for it jerking between first and second gear. When I took it in this morning it had stalled six times within the past 2 days. It stalls after start-up in forward and reverse and it stalled three times while in idle in a fast food drive-thru. There is also the rattling which happens on cold and warm starts, whether the A/C or eco mode are on. It sounds like metal rattling and like it is harming the engine. …”