SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1995SUBURBAN K2500, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 114 (ENGINE CONTROLS - SPECIFICATIONS - 4.3L)FUEL SYSTEMIDLE SPEED & MIXTURE
1995 GMC Suburban K2500, 6.5 F

Idle Speed & Mixture

1995 GMC Suburban K2500, 6.5 FSECTION Idle Speed & Mixture
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1996 Chevrolet Chevy Van, 1995 GMC Vandura, 1995 GMC Sonoma, 1995 GMC Safari, and 1995 GMC Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Idle mixture on fuel injected models is controlled by Electronic Control Module (ECM) and is not adjustable. Controlled idle speed and IAC count can be checked using scan tester. See CONTROLLED IDLE SPEED & IAC COUNT  table.
CONTROLLED IDLE SPEED & IAC COUNT

Application Idle RPM (1) IAC Counts
4.3L CPI
"L" Series
Auto. Trans. (2) 625 15-50
"M", "S" & "T" Series
Auto. Trans. (2) 550 5-40
4.3L TBI
"C" & "K" Series
Auto. Trans. (2)(4) 537 5-30
Auto. Trans. (2)(4) 650 20-35
Manual Trans. (3) 550 2-20
"G" Series
Auto. Trans. (2) 538 5-30
Manual Trans. (3) 650 5-30
"L" Series
Auto. Trans. (2) 625 5-50
Manual Trans. (3) 700 3-30
"M" Series
Auto. Trans. (2) 538 5-30
"P" Series
Auto. Trans. (2) 650 5-30
Manual Trans. (2) 700 5-30
"S" & "T" Series
Auto. Trans. (2) 650 5-30
Manual Trans.
Pickup 725 3-30
Utility 700 5-30
(1) Add 2 counts for engines with less than 500 miles. On 4.3L engines, add 2 counts for every 1000 ft. above sea level.
(2) Automatic transmission in Drive.
(3) Manual transmission in Neutral. Tech 1 scan tester will display "RDL" with transmission in Neutral.
(4) Calibration identification is not given by manufacturer. IAC count and actual RPM should correspond to one of these calibrations.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.