Blazer Forum - Chevy Blazer Forums - Transfer case vacuum switch

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- - Transfer case vacuum switch (https://blazerforum.com/forum/steering-suspension-drivetrain-36/transfer-case-vacuum-switch-38847/)

slowhand

Jan 4, 2010 02:05 PM

Transfer case vacuum switch

I have the common 'flashing buttons but no 4wd' problem on my '99 Blazer here in the UK. Everything else seems OK so I want to replace the transfer case vacuum switch. Trouble is I can't even feel it never mind see it or get a spanner on it. Anyone got any hints on how to change this part??

Thanks.

swartlkk

Jan 4, 2010 03:06 PM

3-button or 4-button dash switch?

slowhand

Jan 4, 2010 04:18 PM

Hi,

4 button. Auto, 2hi, 4hi, 2lo.

Thanks.

swartlkk

Jan 4, 2010 07:51 PM

You are in luck. The reason you cannot locate the transfer case vacuum switch is because the NV236 (4-button switch) does not use one. Instead, it has an electronic vacuum solenoid on the firewall near the distributor.

slowhand

Jan 5, 2010 05:14 AM

That explains a lot! Thanks for the advice; brilliant.

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