2005 GMC Envoy SLT - Answered Questions & Fixed issues


Do you have a code number? otherwise more commonly found when you have just reverse is a cracked cage in the transmission,the good thing is it is a cheap fix.

2005 GMC Envoy... | Answered on Feb 02, 2019 | 37 views


Yes, if you didn't see it from the fuel lines coming from the tank along the frame rail, it's integrated into the fuel pump which is inside the gas tank. I believe 04 was the last year of the external fuel filters for Envoys and Trailblazers.

2005 GMC Envoy... | Answered on Apr 02, 2015 | 89 views


Hi Karen, easy easy, think you already read one of my fixes for this on another post...... Clean your throttle body with the battery disconnected. Will fix your problem, need to clean the Throttle body at least once a year. You'll get better gas mileage too.

2005 GMC Envoy... | Answered on Mar 11, 2015 | 94 views


on top of motor in the back

2005 GMC Envoy... | Answered on Nov 15, 2014 | 168 views


Someone will need to get behind the dash and check the blend doors for operation. It could be a blend door or the main controller.

2005 GMC Envoy... | Answered on Jun 24, 2013 | 75 views


The secondary air system is a system where an air pump puts extra air into the exhaust system for better emissions.
It has nothing to do with the cooling system.
The MAP sensor measures intake manifold vacuum to help tell the computer how much fuel the engine needs.

2005 GMC Envoy... | Answered on Oct 01, 2012 | 171 views


Your drive train may be in limp mode, which indicates something seriously wrong with it (engine or transmission). Check for trouble codes with a code reader.

GMC Envoy Cars &... | Answered on May 26, 2019 | 20 views


Google your question.
About 280,000 results (0.61 seconds)

https://www.autozone.com/repairguides/S-T-Series-Blazer-Bravada-Envoy-Jimmy-Rainier-Trailblazer-Xtreme/Component-Locations/Secondary-Air-Injection-AIR-Pump-Relays/_/P-0996b43f80cb36eb

GMC Envoy Cars &... | Answered on Apr 30, 2019 | 50 views


Look for black wire. Check it by using an omh meter and testing it to a ground.

GMC Envoy Cars &... | Answered on Mar 29, 2019 | 30 views


located in the back . It's called the LGM fuse #2 (Lift Gate Module) The Lift Gate Module controls the defroster grid circuit.

GMC Envoy Cars &... | Answered on Feb 21, 2019 | 47 views


you may need to use a hammer puller

GMC Envoy Cars &... | Answered on Jan 17, 2019 | 27 views


threw a po128 ??? Doesn't throw code's ,it stores code's . P0128 code does not tell you to replace the sensor either . With every code comes a diagnostic test procedure listed in a factory info. manual .
DTC P0128: Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature
The purpose of this diagnostic is to analyze the performance of the thermostat, by using the ECT sensor to determine if the engine coolant will increase at the correct rate, and also meet the calibrated target temperatures under various operating conditions. The ECM uses the start-up ECT and the start-up intake air temperature (IAT) to begin the diagnostic calculation. The air flow into the engine is accumulated, and vehicle speed, distance, and engine run time are also factored in to determine if the ECT does increase normally and reach the calibrated target temperatures.
Diagnostic Aids
?€¢
DTC P0128 occurring with insufficient vehicle interior heating is an indication of improper thermostat operation.


?€¢
Corrosion in the ECT sensor terminals or the ECT harness connector results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.


?€¢
A slight to moderate resistance in the ECT sensor signal circuit or low reference circuit will affect this diagnostic. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.


Circuit/System Verification

  1. Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to Cooling System Leak Testing and Cooling System Draining and Filling .
  2. Ignition OFF for 8 hours or greater.
  3. Ignition ON, observe the scan tool ECT Sensor and IAT Sensor parameters. The ECT, IAT and ambient temperatures should be within 15?°C (27?°F) of each other.
  4. Important: A critical analysis of the operation of the thermostat is necessary to properly diagnose this DTC.
  5. Verify the proper heat range, and the operation of the thermostat. Refer to Thermostat Diagnosis .
  6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the ECT sensor.
  2. Ignition OFF for 90 seconds, test for less than 5 ohms between the low reference circuit terminal B and ground.
  3. ?‡'
    If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

  4. Ignition ON, verify the scan tool ECT Sensor parameter is colder than -39?°C (-38?°F).
  5. ?‡'
    If warmer than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the ECM.

  6. Install a 3A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool ECT Sensor parameter is warmer than 149?°C (300?°F).
  7. ?‡'
    If colder than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

  8. If the circuits test normal, test or replace the ECT sensor.

GMC Envoy Cars &... | Answered on Nov 20, 2018 | 205 views


If the alignment keeps drifting out there is an issue with the suspension. Have the suspension bushes, ball joints and wheel bearings checked. If any of these are worn it can throw out your alignment.
Are you getting any other issues? Things like vague steering, grumbling noises as you accelerate, vibration through the pedals or steering wheel, 'clonks' when hitting potholes? These are all clues to what the issue is.

GMC Envoy Cars &... | Answered on Sep 28, 2018 | 29 views

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