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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > General H2 Discussion

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  #1  
Old 02-09-2014, 07:43 AM
glennf1 glennf1 is offline
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Default Re: '03 H2 - reverse not engaging when firing up after cold night?

At the very least, you need to switch the tranny and transfer case over to Dexron-VI and drain out the Dexron-III, especially in those temps.
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Old 02-14-2014, 08:00 PM
jmudler jmudler is offline
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Default Re: '03 H2 - reverse not engaging when firing up after cold night?

I cant switch out of 4lo or 4hi if it is below 25 unless I warm everything up in 4hi for a mile or two.
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Old 02-15-2014, 03:28 PM
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H2R H2R is offline
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Default Re: '03 H2 - reverse not engaging when firing up after cold night?

Change your filter and fluid completely and go from there.
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