has no power going up hill with small boat on, on flat ground runs good

Asked by Jul 28, 2015 at 03:01 PM about the 2004 GMC Sierra 1500 2 Dr SLE Standard Cab LB

Question type: Maintenance & Repair

had transmission repaired and engine tuned up but can walk faster up hills with 22 ft boat trailer on. ON flat ground unit runs out good, no check engine lights on, last time going to lake was running 4000 rpm and just barley moving  took whole tank of gas to get to lake

1 Answer

34,995

Is your transmission down shifting while going up hills? If not, you may have a bad shift solenoid. Or a bad VSS on the transmission. If transmission is kicking down and you still have no power, I would check your cat converter. It may be plugged. I would pull a couple of plugs and check so see what color they are. If black, you may be having a fuel mixture problem. A bad ECT will cause mixture issues.

Your Answer

Add photo

Related Questions

  • why do i lose power on hills 12 answers

    I lose power on hills change the fuel pump and checked timing changed catalytic converters almost like a restriction but nothing shows on the computer

    2000 GMC Sierra 1500 SLE Standard Cab LB

    -

    Maintenance & Repair

  • Bad ground? 52 answers

    While im driving my truck acts as if i put it in neutral. Last for just a second, sometimes it "stutters" per say, The engine revs but it doesn't actually kept going. I know its not the tranny be...

    1993 GMC Sierra 1500 C1500 SLX Extended Cab SB

    -

    Maintenance & Repair

  • rough idle, stalling, loss of power. 225 answers

    o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so. I don't think its the torqu...

    1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB

    -

    Maintenance & Repair

  • Experiencing loss of power, especially going up hills 4 answers

    I was driving my 2001 GMC Sierra 1500 the other day and it started having some performance issues. I noticed that the engine would lose a lot of power and almost die but then it would sort of cough an...

    2001 GMC Sierra 1500

    -

    Maintenance & Repair

  • Replacement tires for the Run - flat tires 63 answers

    Hi there, I bought a 2007 Sienna XLE AWD last July and currently have about 11,000 miles on them. I do have the run - flat tries that originally came with the car. As it appears the tread on the t...

    2007 Toyota Sienna XLE AWD

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,620
#2 John Saffrahn
John Saffrahn
Reputation 3,230
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,890
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,579 Great Deals out of 151,095 listings starting at $1,500
Used Ford F-150
3,035 Great Deals out of 207,199 listings starting at $1,990
Used GMC Sierra 2500HD
145 Great Deals out of 13,219 listings starting at $3,500
Used Toyota Tundra
671 Great Deals out of 27,892 listings starting at $2,500
Used Dodge Ram 1500
530 Great Deals out of 13,026 listings starting at $1,800
Used Chevrolet Silverado 2500HD
394 Great Deals out of 27,129 listings starting at $2,998
Used Toyota Tacoma
713 Great Deals out of 31,628 listings starting at $2,750
Used GMC Yukon
548 Great Deals out of 16,876 listings starting at $2,495
Used Chevrolet Tahoe
857 Great Deals out of 27,925 listings starting at $1,700
Used Ford F-250 Super Duty
442 Great Deals out of 42,874 listings starting at $2,750
Used GMC Sierra 1500HD
7 Great Deals out of 117 listings starting at $4,500
Used GMC Canyon
139 Great Deals out of 8,010 listings starting at $2,600
Used GMC Sierra 2500
184 listings starting at $6,497

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
24 Great Deals out of 32,461 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
69 Great Deals out of 4,729 listings starting at $18,710
2015 GMC Sierra 1500 For Sale
162 Great Deals out of 4,288 listings starting at $15,888
2014 GMC Sierra 1500 For Sale
168 Great Deals out of 4,308 listings starting at $12,750
2013 GMC Sierra 1500 For Sale
114 Great Deals out of 2,466 listings starting at $9,500