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#12203662 - 04/17/17 06:07 PM New vehicle break in
Eddyc01 Offline
Outdoorsman

Registered: 12/06/12
Posts: 246
Loc: Leslieville
I recently bought a 2017 GMC Sierra with the 5.3 engine.
My question is does the engine require a break in period, and if so how long?
So far it's been about 300 miles and I've babies it so far usually doing 2500 rpm or less. The highest I've taken the engine has been about 3500 rpm.
Also should I do my first oil change at about 2000 miles or should I follow the schedule in the manual?
I intend to keep this truck for a while.....

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#12203740 - 04/17/17 06:59 PM Re: New vehicle break in [Re: Eddyc01]
2 Bee'z Online   happy
honey boo boo

Registered: 07/23/15
Posts: 16076
Loc: Lake Texoma, TX
Not necessary with the engines and lubricants available now days. I have a 2011 that I got off the lot with 0.8 miles on the odo and it passed 160k this weekend.

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#12203800 - 04/17/17 07:29 PM Re: New vehicle break in [Re: 2 Bee'z]
Chris B Online   content
TFF Celebrity

Registered: 05/02/03
Posts: 8147
Loc: Prosper, TX
I think they say no towing for the first 500 miles. That's about it. Guess that's why my 5.3 only made it 305,000. I had to go fishing.
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#12203802 - 04/17/17 07:29 PM Re: New vehicle break in [Re: Eddyc01]
patriot07 Offline
TFF Guru

Registered: 04/20/10
Posts: 19298
Loc: chateau d'if
Agreed, not necessary.
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#12204448 - 04/18/17 07:30 AM Re: New vehicle break in [Re: Eddyc01]
redchevy Offline
TFF Celebrity

Registered: 01/25/05
Posts: 7102
Loc: texas
When I was in college my best friends granpa bought a new truck a 2008 chevy with 5.3. We were at his house and he threw us the keys and said go see what you think of it. We hit the governor a handful of times from a dead stop pedal on the floor till the governor kicked in with less than 20 miles on it. It was a great truck ever after.

Would I do it with mine? HELL NO. On my last chevy I just took it easy on it at first and easy on it the first few times towing changed oil first time a little early.

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#12205088 - 04/18/17 12:22 PM Re: New vehicle break in [Re: Chris B]
Stump jumper Offline
TFF Celebrity

Registered: 04/19/04
Posts: 8060
Loc: Rockwall
Originally Posted By: Chris B
I think they say no towing for the first 500 miles. That's about it. Guess that's why my 5.3 only made it 305,000. I had to go fishing.
I think this is more about the tranny and the rear diff. You don't want to overheat those gears in the diff. One reason that varying speed is recommended.
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#12205274 - 04/18/17 01:29 PM Re: New vehicle break in [Re: Eddyc01]
redchevy Offline
TFF Celebrity

Registered: 01/25/05
Posts: 7102
Loc: texas
All the intricate moving parts and seals and bearings etc. in modern engines and transmissions... I just absolutely cannot wrap my head around the break in period have much of anything to do with the gears in the differential.

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#12206737 - 04/19/17 10:00 AM Re: New vehicle break in [Re: Eddyc01]
Allison1 Online   sleepy
TFF Guru

Registered: 12/14/03
Posts: 18563
Loc: Grand Prairie, Tx
The gears take a set in the first several hours. I have been told over the years that there should be no towing for the first thousand miles in a new truck. That was also in my Dodge's owners manual.

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#12206964 - 04/19/17 11:58 AM Re: New vehicle break in [Re: Eddyc01]
redchevy Offline
TFF Celebrity

Registered: 01/25/05
Posts: 7102
Loc: texas
Our 2004 duramax manual said no speed over 55 mph for the first 500 miles. No towing for the first 500 miles and no towing over 55 mph for the first 500 miles of towing.

We abided by the break in and it sucked. Took a couple hundred mile hwy trip to get 500 original miles on it... people hated us and I probably hated myself a little.

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#12207013 - 04/19/17 12:22 PM Re: New vehicle break in [Re: Eddyc01]
ChuChu1 Offline
TFF Team Angler

Registered: 03/08/10
Posts: 3377
Loc: Gonzales, Tx
Break it in like you are going to drive it.
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#12207286 - 04/19/17 03:48 PM Re: New vehicle break in [Re: Eddyc01]
retdbasser Offline
Extreme Angler

Registered: 11/29/06
Posts: 1682
Loc: Garland,TX
Read the manual. Do what it says. fish
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Prepare for the future-it will be here tomorrow.

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#12211651 - 04/22/17 01:55 PM Re: New vehicle break in [Re: Eddyc01]
psycho0819 Offline
Extreme Angler

Registered: 03/27/05
Posts: 1562
Loc: Kaufman
I agree, with the new valve train components and lubricants today, drive it like you always will. The same cannot be said using older flat tappet cams and related components, but that's another thread.
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#12215334 - 04/25/17 09:35 AM Re: New vehicle break in [Re: Eddyc01]
lenahorse Online   content
TFF Team Angler

Registered: 10/11/12
Posts: 4068
Loc: Cash, Texas
My 17 Dodge I just bought I asked the same question, they said just drive it normally as you will use it, I mentioned towing my boat they said do it, I have hauled the boat wit and without tow haul on there is a difference with it on, not too much mileage difference but some. It pulls very well with the 5.7 motor and 8 speed transmission, it does not pull like my F250 4x4 diesel though but not expected to do so. Oddly the mileage towing my boat is about the same with both trucks, but the Dodge sure does do better not towing.
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#12223688 - 04/30/17 12:10 AM Re: New vehicle break in [Re: Eddyc01]
Hog Jaw Offline
Extreme Angler

Registered: 06/09/08
Posts: 2588
Loc: The Great State of Texas
Drive it like you stole it , pulled my Travel Trailer , 30' loaded to the gills , running 70 to 75 no problem , got 11 mpg , 2017 Duramax-Alison.

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#12224761 - 04/30/17 10:27 PM Re: New vehicle break in [Re: Eddyc01]
2014NITROZ-7 Online   content
Pro Angler

Registered: 05/06/10
Posts: 655
Loc: Texas
Just remember the computer records everything.And they look for any reason to void a warranty.

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