why do i lose power on hills


Asked by Oct 17, 2013 at 08:11 PM about the 2000 GMC Sierra 1500 SLE Standard Cab LB

Question type: Maintenance & Repair

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

14 Answers

could be any number of concerns...fuel pressure regulator...malfunctioning EGR...bad IAT (intake air temp) and Block temperature senders~ if well over 80,000 miles would argue that the egr valve is sufficiently clobbered with carbon and a bath in paint thinner or brake cleaner will make it operate properly~

1 out of 1 people think this is helpful.
Best Answer

connect a fifteen dollar OBD-II reader and read/reset your trouble codes~....NO codes will appear for a bad fuel pressure regulator~

1 out of 1 people think this is helpful.

tried all that the computer says everything is working fine, new fuel pump the air is flowing good changed catalytic converters if you push slow on fuel peddle it goes to top RPM.S kick it fast it starts bogging down and loses power

6 out of 6 people think this is helpful.

it will not show any codes

1 out of 1 people think this is helpful.

nope...but if not functioning properly will not idle or accelerate properly now I'm thinkin' TPS~ those are about fifty bucks~

you know the purpose of the EGR is to introduce exhaust gas back in on deceleration and also when combustion temperatures get TOO hot, kicks in to put a little cat food in the chili (so to speak)~ ...so yours may very well be clobbered with exhaust carbon or the diaphragm is inoperative~

1 out of 1 people think this is helpful.

The TPS will make the ECU "go nuts" as it says...I'm here..NO I'm to the floor NO I'm mid positon....no I'm here to confuse the air/fuel mix..so yes they wear out...tho entirely optical DO get fouled up with use...it's a relatively cheap thingamabob so once it has been replaced...we can omit it from the spectrum of troubled areas~

1 out of 1 people think this is helpful.

Mine has been having the same problems, but is actually throwing codes. P0171, P0174, P033, P1133. Replaced 02 sensors, Checked MAF (good), replaced air filter, replacing spark plugs and wires. Any ideas?

3 out of 3 people think this is helpful.

I tried everything so now putting a new computer in it I hope this works Sorry you are having the same problem

2 out of 2 people think this is helpful.

....everything...we haven't tried the MOST basic...that is the 1/0 CABLE that connects the battery to the chassis ground...gets smoked with deposits from the mating surface....then becomes unreliable issuing varying voltages and available amperages~....so get a NEW battery and assure the ground connection is SHINY and able to pull 300 cold cranking amps with no care~

1 out of 1 people think this is helpful.

2000 gmc sierra 4.3 shows lean feul but can not find how or where to look

2 out of 2 people think this is helpful.

my 2000 sierra starts good and ideals good the only thing that shows up on the scanner is the fuel is lean everything else shows good pls help

1 out of 1 people think this is helpful.

Bad spark control module people.......that's the problem....

check your timming mine was way off

Your Answer

Add photo

Related Questions

  • can anybody tell me how to fix my truck I lose power on hills tried everything HELP PLEASE 3 answers

    my 2000 sierra loses power on hills please tell me what to look for

    2000 GMC Sierra 1500 SL Standard Cab 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

  • has no power going up hill with small boat on, on flat ground runs good 1 answer

    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...

    2004 GMC Sierra 1500 2 Dr SLE Standard Cab LB


    Maintenance & Repair

  • rough idle, stalling, loss of power. 228 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

  • why does my 95 gmc yukon have no power 1 answer

    I replaced all censors, did full tune up, replaced coil, not the catalic converter, replaced the o2sensor, Checked for intake leaks, And still have no power when going up hill

    1995 GMC Yukon SLE 4WD


    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 66,330 nationwide Sierra 1500 listings starting at $1,995.


Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
Reputation 4,910
#2 John Saffrahn
John Saffrahn
Reputation 3,490
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,060
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,758 Great Deals out of 167,558 listings starting at $1,800
Used Ford F-150
2,242 Great Deals out of 209,413 listings starting at $1,499
Used GMC Sierra 2500HD
109 Great Deals out of 14,597 listings starting at $2,650
Used Toyota Tundra
477 Great Deals out of 33,295 listings starting at $3,305
Used Dodge Ram 1500
432 Great Deals out of 11,327 listings starting at $1,000
Used Toyota Tacoma
486 Great Deals out of 39,057 listings starting at $2,900
Used Chevrolet Silverado 2500HD
318 Great Deals out of 26,883 listings starting at $1,250
Used GMC Yukon
363 Great Deals out of 17,031 listings starting at $2,500
Used Chevrolet Tahoe
557 Great Deals out of 27,477 listings starting at $999
Used Ford F-250 Super Duty
359 Great Deals out of 47,665 listings starting at $1,795
Used Chevrolet Camaro
151 Great Deals out of 32,912 listings starting at $1,995
Used GMC Sierra 2500
166 listings starting at $4,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
37 Great Deals out of 41,417 listings starting at $20,121
2016 GMC Sierra 1500 For Sale
88 Great Deals out of 3,782 listings starting at $17,695
2015 GMC Sierra 1500 For Sale
98 Great Deals out of 3,914 listings starting at $15,400
2014 GMC Sierra 1500 For Sale
99 Great Deals out of 4,247 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
70 Great Deals out of 2,138 listings starting at $9,260