Used 2018 GMC Sierra 1500 Consumer Reviews
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Disappointed Chevy Man ?
Chip O’Brian , 01/08/2020
updated 07/16/2024
2018 GMC Sierra 1500 Denali 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 8A)
7 of 7 people found this review helpful
2018 Denali 6.2L Transmission clunks, lag shifts, hard shifts up and down. 14 k would not go in gear, codes pop up. Dealer replaced battery 🤣 15k appears low idle miss. No codes dealer had no answers. Poor file mileage 13 - 16 mpg. Dash averages state 19 , no answers from dealer. To Be Continued! Transmission continues to shift poorly 23 k now Trans still problem at 32 K , fuel mileage poor, as of 2023 gets worse radio not functioning as intended, electrical issues, and only 42k miles, out of full coverage warranty.. Very disappointing 7/12/23 Truck only get worse only 44k miles out of full warranty, infotainment center screen goes out, GM does nothing cost me a $1200 , lost clarity of back up camera, dealer says it’s bad now $300 more, still no clarity can’t even see out at night. Dealer finally changed out torque converter, still have cold slip in first to second in morning. Electric issues now fuel gauge only reads 3/4 tank, bumper sensor flashing while driving. Truck is a lemon and GM will do nothing!! 1/14/2024 Still same problems. I’ve contacted GM for help with very little received. Fixing to be out of power train warranty as well. Sorry I didn’t push the lemon law when I could!! 7/16/24 Transmission is crap 💩 , Contacted GENERAL MOTORS got a complete run around, asked them to please extend the warranty for fear of serious transmission failures. Told me kiss off. Very disappointed with GM . Now I understand that a class action law suit is happening, Hope GM LOOSES ITS butt. Chip O’B
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2018 denali, 5.3 , 8 speed transmission
rreyes, 10/05/2020
2018 GMC Sierra 1500 Denali 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 8A)
5 of 5 people found this review helpful
purchased it in 2020 brand new, going on 14 k miles, so far, I love this truck, yes, I noticed every now and than that the transmission jerks a bit between 2 and 3rd gear, sometimes is noticeable, sometimes it is not, but other than that, I am very happy with my truck, love the fuel efficiency, i can get up to 22 mpg on highway , as compared to 15 with my 2018 tundra, smooth ride, lots of comfort, very quiet , plenty of power
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2018 GMC Sierra 1500 for sale near you
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- Denali Crew CabMSRP: $27,99571 mi away
- SLT Crew CabMSRP: $24,49897 mi away
- SLT Crew CabMSRP: $29,99081 mi away
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SLT 6.2L 8 speed
TXGREEK , 01/09/2018
updated 07/10/2019
2018 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 6.5 ft. SB (5.3L 8cyl 6A)
16 of 23 people found this review helpful
2018 SLT 6.2L Crew Cab Z71 standard bed with 20” wheels. Absolutely amazing truck with awesome power and extremely comfortable. I’m getting 15+ City 22+ Hwy. Make sure to look for the big boy 6.2L engine you will not regret it!
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2018 GMC Denali 6.2
Gordon, 04/18/2019
2018 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 6A)
10 of 14 people found this review helpful
Traded in 2015 Silverado 6.2 4x4 because 8 speed transmission clunking for a 2018 GMC Denali 6.2 ultimum. First issue, sunroof driver's side drain hose not connected. Water inside driver's rear tail light. Now my truck has 18,000. Loud chirping noise from engine. Service technician removed all serpentine belts. Started truck still chirping, engine has mechanical issues. Mechanic and I both notice excessive play in water pump bearing/pulley. If it wasn't for it internal chirping don't know how long before the water pump would have gone out. At, 18,000 miles I beginning to wonder if buying this Denali made with inferior Mexico parts was a wise decision. Was given a rental car. Too many issues so far not including what recalls I may receive in the mail.
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Shifts at low speeds like an 18 wheeler
Manuel Chavez Jr, 04/28/2019
2018 GMC Sierra 1500 SLT 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 6A)
6 of 8 people found this review helpful
I’ve taken my 2018 GMC Sierra more times to the dealer in this first year than I did my Ford F-150 Lariat that I owned for 13 years. The vehicle shifts abruptly at low speeds. Was told by dealer that it was the lesser quality of gasoline I was using. Well I have been fueling with 93% octane since then but it stills chugs along at low speeds. At high speeds it rides smooth and quietly but it is not shifting gears. The dealer says there is nothing wrong with the truck. But I dont like they way it chugs salons around the neighborhood when running errands.
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