# 2004 GMC Envoy: low oil pressure **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** envoy, gmc\ **Created:** [December 28, 2018, 8:46pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561 "2018-12-28T20:46:23Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Richard211](https://avatars.discourse-cdn.com/v4/letter/r/bcef8e/32.png) [@Richard211](https://community.cartalk.com/u/Richard211)\ **Post date:** [December 28, 2018, 8:46pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/1 "2018-12-28T20:46:23Z")
2004 gmc envoy have low oil pressure come on after driving for awhile. I have flushed engine , changed oil and new sending unit. Where do I look now? Truck has 260 000 miles on it ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [December 28, 2018, 9:05pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/2 "2018-12-28T21:05:37Z")
> [@Richard211](#): > > Truck has 260 000 miles on it There is your answer . ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [December 28, 2018, 9:09pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/3 "2018-12-28T21:09:26Z")
> [@Richard211](#): > > Where do I look now? Look to replacing all the engine bearings, this old girl is worn out. You could turn off the oil light for a while by using a thicker grade of oil. If it calls for 5W30, then use 10W40 or 15W50. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [December 29, 2018, 8:01pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/4 "2018-12-29T20:01:00Z")
> [@Richard211](#): > > Where do I look now? You hook up a mechanical gauge and verify the pressure problem and just how bad it is. The Trailvoy platform has a pressure _switch_, not a sender. The ECM adjusts the pressure reading on the gauge based on engine RPM. In other words, a guesstimate not an actual pressure reading. Start with verifying the actual pressure readings… ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [December 29, 2018, 8:53pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/5 "2018-12-29T20:53:23Z")
@TwinTurbo is spot on in my opinion! ---
**Author:** ![vipergg](https://avatars.discourse-cdn.com/v4/letter/v/50afbb/32.png) [@vipergg](https://community.cartalk.com/u/vipergg)\ **Post date:** [December 29, 2018, 10:40pm UTC](https://community.cartalk.com/t/2004-gmc-envoy-low-oil-pressure/131561/6 "2018-12-29T22:40:01Z")
Right , verify the oil pressure . could be a worn oil pump with that mileage on it . Has it been burning any oil ?