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2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic recently, the truck become sluggish and slammed into gear. It reminded me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.

2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic recently, the truck became sluggish and slammed into gear. It reminded me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.

2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic recently, the truck become sluggish, lurched, and slammed into gear. It reminded me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.

2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic recently, the truck become sluggish and slammed into gear. It reminded me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.

2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic, the truck becomes sluggish, jolty, and slams into gear. It reminds me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at an average temperature of 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When Idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.

2010 Silverado 1500; automatic transmission; 500,000 km.

I suspect the engine fans are not turning on when they should.

Reason:

When stuck in traffic recently, the truck become sluggish, lurched, and slammed into gear. It reminded me of when my 2005 Malibu is accidentally put into low gear instead of drive; you can feel the transmission isn't working right/is running hot.

When stuck in traffic or idling, the truck engine stays at 100-105 deg C (good). However, the transmission temperature rises to 90-93 deg C (bad, I think); whereas the normal highway tranny temp is 47 deg C.

Idling:

When should the engine fans turn on? Would they cool the transmission? For example, should the fans turn on when the transmission is above n degrees? When idling, I've only noticed the fans come on occasionally, and only for a few seconds.

For what it's worth, I noticed there is a smaller radiator in front of the main engine rad. I suspect the smaller rad is meant to cool the transmission.

I am a novice.