2008 gmc fuel mileage droping

By Bill Foster
May 10, 2020 in Future GM News & Rumors

Recommended Posts

Bill Foster

Posted May 10, 2020

ok my 2008 used to get 16.3 mileage on the average now its down to 14.7 .put on scanner it reads something different every time using a snap on top of line scanner said all plugs misfiring then the next time low fuel pressure any Ideas. put new fuel press sensor plugs help im old school mechanic

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

Recently Browsing 0 members
- No registered users viewing this page.
Forum Statistics

250.4k
Total Topics

2.7m
Total Posts
Member Statistics

342,835
Total Members

8,960
Most Online

Newest Member
ballencd
Joined 11 hours ago
Who's Online 3 Members, 0 Anonymous, 449 Guests (See full list)

Latest Articles
- Hummer Turns 25 and GMC Brought the H2’s Yellow Back
  Wednesday at 06:04 PM
- What’s New for the 2027 GMC Yukon and Yukon XL
  Monday at 06:15 PM
- Got a “Service Door Latch” Alert? Fix It in a Minute
  July 9
- GM Recalls Cadillac VISTIQ Over Power-Folding Seats
  July 8
Posts
- Hot air constantly blowing through floor vents, drivers side only?
  
  By davester · Posted 1 minute ago
  
  are the heater controls set for hot or cold air? If it's set for hot, and say, to get air from outside the cab (vs recirculated air), even w the fan off, air will get pushed through the hvac system, over the heater core and into the cab. Switching it to cold will reduce the temp to whatever it is outside. Switching to recirculate mode (which may mean switching to vents or whatever, read your owners manual), will reduce the amount of airflow through the hvac system.
- Hot air constantly blowing through floor vents, drivers side only?
  
  By dna9656 · Posted 36 minutes ago
  
  Prolly diaphragm bellows rotted out. Given the age of your truck.
- Slate Electric Truck
  
  By Grumpy Bear · Posted 1 hour ago
  
  https://reotrucks.com/the-case The WHY, answered.
- Gas Prices
  
  By Grumpy Bear · Posted 1 hour ago
  
  $4.05. down a dime from yesterday. Yo-Yo
- Gas Prices
  
  By Chuck FB · Posted 3 hours ago
  
  I am guessing that is good relatively speaking given that its probably a popular vacation spot and that usually means a captive market. Right now we are sitting at 1.73 a liter for regular and that would have ethanol in it as we don't have such a thing as no ethanol regular fuel it seems, and diesel at 1.80 a liter, priced in Canadian Pesos ......
GM-Trucks.com Clubs
- Black Truck Club
  
  Open Club · 612 members
- White Truck Club
  
  Open Club · 380 members
- Canadian Owners Club
  
  Open Club · 282 members
- Red Truck Club
  
  Open Club · 157 members
- diesel 3.0
  
  Open Club · 281 members
- Texas Owner's Group
  
  Open Club · 371 members
- NorthSky Blue Club
  
  Open Club · 118 members
- Midwest Owner's Group
  
  Open Club · 213 members
- 2015 Custom Sport Club
  
  Open Club · 5 members
- GM Snow Plowing Club HD
  
  Closed Club · 14 members
Popular Contributors
- Week
- Month
- Year
- All Time
1. 1
  
  Grumpy Bear
  18
2. 2
  
  Chuck FB
  16
3. 3
  
  newdude
  12
4. 4
  
  Atlas
  10
5. 5
  
  OnTheReel
  8
Show More