Some medicines, tricyclic antidepressants and antimalarials can also cause darkening of your gums. The nastiest is the effect of acute necrotising periodontitis (sometimes known as trench mouth) which is advanced gum disease and the black colour is the result of dead tissue.
The average cost for a heater blower motor replacement is between $289 to $413. Labor costs are estimated between $119 to $151 while parts are priced between $170 to $262.Get a personalized estimate based on your location and specific car.Estimate does not include taxes and fees.abor costs are estimated between $119 to $151 while parts are priced between $170 to $262. Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
Remove the wiring harness from the back of the blower motor in your  1993 GMC 1500. Remove the blower motor retaining bolts. If the new  blower motor does not have the fan a â¦ ttached to and you will need to  remove the fan from the old blower motor. Reverse the process to  install the new blower motor.